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Finding the Fourth Proportional to 487,861.40, 731,792.10 and 288,277.40

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Solution

The fourth proportional to 487,861.40, 731,792.10 and 288,277.40 is: 432,416.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,861.40 : 731,792.10 = 288,277.40 : x
  2. Step 2: Convert to fraction form
    487,861.40/731,792.10 = 288,277.40/x
  3. Step 3: Cross multiply
    487,861.40x = 731,792.10 × 288,277.40
  4. Step 4: Simplify right side
    487,861.40x = 210,959,123,928.54
  5. Step 5: Solve for x
    x = 210,959,123,928.54/487,861.40
  6. Step 6: Final answer
    x = 432,416.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.