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Finding the Fourth Proportional to 415,207.80, 622,965.30 and 134,734.20

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Solution

The fourth proportional to 415,207.80, 622,965.30 and 134,734.20 is: 202,151.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,207.80 : 622,965.30 = 134,734.20 : x
  2. Step 2: Convert to fraction form
    415,207.80/622,965.30 = 134,734.20/x
  3. Step 3: Cross multiply
    415,207.80x = 622,965.30 × 134,734.20
  4. Step 4: Simplify right side
    415,207.80x = 83,934,731,323.26
  5. Step 5: Solve for x
    x = 83,934,731,323.26/415,207.80
  6. Step 6: Final answer
    x = 202,151.14

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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.