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Finding the Fourth Proportional to 415,472.80, 623,209.20 and 135,018.40

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Solution

The fourth proportional to 415,472.80, 623,209.20 and 135,018.40 is: 202,527.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,472.80 : 623,209.20 = 135,018.40 : x
  2. Step 2: Convert to fraction form
    415,472.80/623,209.20 = 135,018.40/x
  3. Step 3: Cross multiply
    415,472.80x = 623,209.20 × 135,018.40
  4. Step 4: Simplify right side
    415,472.80x = 84,144,709,049.28
  5. Step 5: Solve for x
    x = 84,144,709,049.28/415,472.80
  6. Step 6: Final answer
    x = 202,527.60

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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.