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Finding the Fourth Proportional to 685,155.32, 945,490.22 and 379,232.30

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Solution

The fourth proportional to 685,155.32, 945,490.22 and 379,232.30 is: 523,327.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,155.32 : 945,490.22 = 379,232.30 : x
  2. Step 2: Convert to fraction form
    685,155.32/945,490.22 = 379,232.30/x
  3. Step 3: Cross multiply
    685,155.32x = 945,490.22 × 379,232.30
  4. Step 4: Simplify right side
    685,155.32x = 358,560,430,758.11
  5. Step 5: Solve for x
    x = 358,560,430,758.11/685,155.32
  6. Step 6: Final answer
    x = 523,327.22

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Double scale
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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.