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Finding the Fourth Proportional to 417,089.80, 625,634.70 and 136,635.40

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Solution

The fourth proportional to 417,089.80, 625,634.70 and 136,635.40 is: 204,953.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,089.80 : 625,634.70 = 136,635.40 : x
  2. Step 2: Convert to fraction form
    417,089.80/625,634.70 = 136,635.40/x
  3. Step 3: Cross multiply
    417,089.80x = 625,634.70 × 136,635.40
  4. Step 4: Simplify right side
    417,089.80x = 85,483,847,488.38
  5. Step 5: Solve for x
    x = 85,483,847,488.38/417,089.80
  6. Step 6: Final answer
    x = 204,953.10

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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.