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Finding the Fourth Proportional to 625,628.10, 863,367.93 and 339,147.30

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Solution

The fourth proportional to 625,628.10, 863,367.93 and 339,147.30 is: 468,023.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,628.10 : 863,367.93 = 339,147.30 : x
  2. Step 2: Convert to fraction form
    625,628.10/863,367.93 = 339,147.30/x
  3. Step 3: Cross multiply
    625,628.10x = 863,367.93 × 339,147.30
  4. Step 4: Simplify right side
    625,628.10x = 292,808,902,366.09
  5. Step 5: Solve for x
    x = 292,808,902,366.09/625,628.10
  6. Step 6: Final answer
    x = 468,023.90

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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.