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Finding the Fourth Proportional to 625,172.64, 862,736.64 and 338,699.76

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Solution

The fourth proportional to 625,172.64, 862,736.64 and 338,699.76 is: 467,404.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,172.64 : 862,736.64 = 338,699.76 : x
  2. Step 2: Convert to fraction form
    625,172.64/862,736.64 = 338,699.76/x
  3. Step 3: Cross multiply
    625,172.64x = 862,736.64 × 338,699.76
  4. Step 4: Simplify right side
    625,172.64x = 292,208,692,911.21
  5. Step 5: Solve for x
    x = 292,208,692,911.21/625,172.64
  6. Step 6: Final answer
    x = 467,404.80

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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.