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Finding the Fourth Proportional to 415,342.40, 623,167.20 and 399,982.40

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Solution

The fourth proportional to 415,342.40, 623,167.20 and 399,982.40 is: 600,121.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,342.40 : 623,167.20 = 399,982.40 : x
  2. Step 2: Convert to fraction form
    415,342.40/623,167.20 = 399,982.40/x
  3. Step 3: Cross multiply
    415,342.40x = 623,167.20 × 399,982.40
  4. Step 4: Simplify right side
    415,342.40x = 249,255,912,257.28
  5. Step 5: Solve for x
    x = 249,255,912,257.28/415,342.40
  6. Step 6: Final answer
    x = 600,121.52

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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.