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Finding the Fourth Proportional to 385,403.80, 577,961.90 and 132,612.78

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Solution

The fourth proportional to 385,403.80, 577,961.90 and 132,612.78 is: 198,869.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,403.80 : 577,961.90 = 132,612.78 : x
  2. Step 2: Convert to fraction form
    385,403.80/577,961.90 = 132,612.78/x
  3. Step 3: Cross multiply
    385,403.80x = 577,961.90 × 132,612.78
  4. Step 4: Simplify right side
    385,403.80x = 76,645,134,293.08
  5. Step 5: Solve for x
    x = 76,645,134,293.08/385,403.80
  6. Step 6: Final answer
    x = 198,869.69

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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.