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Finding the Fourth Proportional to 487,445.40, 731,168.10 and 425,237.40

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Solution

The fourth proportional to 487,445.40, 731,168.10 and 425,237.40 is: 637,856.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,445.40 : 731,168.10 = 425,237.40 : x
  2. Step 2: Convert to fraction form
    487,445.40/731,168.10 = 425,237.40/x
  3. Step 3: Cross multiply
    487,445.40x = 731,168.10 × 425,237.40
  4. Step 4: Simplify right side
    487,445.40x = 310,920,021,806.94
  5. Step 5: Solve for x
    x = 310,920,021,806.94/487,445.40
  6. Step 6: Final answer
    x = 637,856.10

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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.