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Finding the Fourth Proportional to 685,430.76, 945,860.22 and 375,325.32

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Solution

The fourth proportional to 685,430.76, 945,860.22 and 375,325.32 is: 517,930.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,430.76 : 945,860.22 = 375,325.32 : x
  2. Step 2: Convert to fraction form
    685,430.76/945,860.22 = 375,325.32/x
  3. Step 3: Cross multiply
    685,430.76x = 945,860.22 × 375,325.32
  4. Step 4: Simplify right side
    685,430.76x = 355,005,289,746.77
  5. Step 5: Solve for x
    x = 355,005,289,746.77/685,430.76
  6. Step 6: Final answer
    x = 517,930.20

Related Problems

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Half scale
Find fourth proportional to 1,370,861.52, 1,891,720.44 and 750,650.64
Double scale
Find fourth proportional to 685,431.76, 945,861.60 and 375,326.32
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.