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Finding the Fourth Proportional to 625,715.20, 863,422.14 and 384,007.96

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Solution

The fourth proportional to 625,715.20, 863,422.14 and 384,007.96 is: 529,891.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,715.20 : 863,422.14 = 384,007.96 : x
  2. Step 2: Convert to fraction form
    625,715.20/863,422.14 = 384,007.96/x
  3. Step 3: Cross multiply
    625,715.20x = 863,422.14 × 384,007.96
  4. Step 4: Simplify right side
    625,715.20x = 331,560,974,600.23
  5. Step 5: Solve for x
    x = 331,560,974,600.23/625,715.20
  6. Step 6: Final answer
    x = 529,891.19

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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.