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Finding the Fourth Proportional to 625,691.57, 863,419.77 and 353,742.21

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Solution

The fourth proportional to 625,691.57, 863,419.77 and 353,742.21 is: 488,144.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,691.57 : 863,419.77 = 353,742.21 : x
  2. Step 2: Convert to fraction form
    625,691.57/863,419.77 = 353,742.21/x
  3. Step 3: Cross multiply
    625,691.57x = 863,419.77 × 353,742.21
  4. Step 4: Simplify right side
    625,691.57x = 305,428,017,597.49
  5. Step 5: Solve for x
    x = 305,428,017,597.49/625,691.57
  6. Step 6: Final answer
    x = 488,144.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.