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Finding the Fourth Proportional to 415,387.52, 623,141.40 and 130,981.52

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Solution

The fourth proportional to 415,387.52, 623,141.40 and 130,981.52 is: 196,491.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,387.52 : 623,141.40 = 130,981.52 : x
  2. Step 2: Convert to fraction form
    415,387.52/623,141.40 = 130,981.52/x
  3. Step 3: Cross multiply
    415,387.52x = 623,141.40 × 130,981.52
  4. Step 4: Simplify right side
    415,387.52x = 81,620,007,746.93
  5. Step 5: Solve for x
    x = 81,620,007,746.93/415,387.52
  6. Step 6: Final answer
    x = 196,491.24

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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.