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Finding the Fourth Proportional to 385,414.40, 577,387.20 and 207,862.40

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Solution

The fourth proportional to 385,414.40, 577,387.20 and 207,862.40 is: 311,397.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,414.40 : 577,387.20 = 207,862.40 : x
  2. Step 2: Convert to fraction form
    385,414.40/577,387.20 = 207,862.40/x
  3. Step 3: Cross multiply
    385,414.40x = 577,387.20 × 207,862.40
  4. Step 4: Simplify right side
    385,414.40x = 120,017,089,121.28
  5. Step 5: Solve for x
    x = 120,017,089,121.28/385,414.40
  6. Step 6: Final answer
    x = 311,397.52

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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.