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Finding the Fourth Proportional to 685,151.83, 945,485.40 and 379,228.80

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Solution

The fourth proportional to 685,151.83, 945,485.40 and 379,228.80 is: 523,322.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,151.83 : 945,485.40 = 379,228.80 : x
  2. Step 2: Convert to fraction form
    685,151.83/945,485.40 = 379,228.80/x
  3. Step 3: Cross multiply
    685,151.83x = 945,485.40 × 379,228.80
  4. Step 4: Simplify right side
    685,151.83x = 358,555,291,763.38
  5. Step 5: Solve for x
    x = 358,555,291,763.38/685,151.83
  6. Step 6: Final answer
    x = 523,322.39

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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.