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Finding the Fourth Proportional to 618,407.70, 927,611.55 and 478,266.90

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Solution

The fourth proportional to 618,407.70, 927,611.55 and 478,266.90 is: 717,400.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,407.70 : 927,611.55 = 478,266.90 : x
  2. Step 2: Convert to fraction form
    618,407.70/927,611.55 = 478,266.90/x
  3. Step 3: Cross multiply
    618,407.70x = 927,611.55 × 478,266.90
  4. Step 4: Simplify right side
    618,407.70x = 443,645,900,422.70
  5. Step 5: Solve for x
    x = 443,645,900,422.70/618,407.70
  6. Step 6: Final answer
    x = 717,400.35

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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.