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Finding the Fourth Proportional to 415,280.20, 622,689.90 and 165,680.20

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Solution

The fourth proportional to 415,280.20, 622,689.90 and 165,680.20 is: 248,428.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,280.20 : 622,689.90 = 165,680.20 : x
  2. Step 2: Convert to fraction form
    415,280.20/622,689.90 = 165,680.20/x
  3. Step 3: Cross multiply
    415,280.20x = 622,689.90 × 165,680.20
  4. Step 4: Simplify right side
    415,280.20x = 103,167,387,169.98
  5. Step 5: Solve for x
    x = 103,167,387,169.98/415,280.20
  6. Step 6: Final answer
    x = 248,428.38

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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.