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Finding the Fourth Proportional to 621,251.60, 857,397.78 and 345,636.72

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Solution

The fourth proportional to 621,251.60, 857,397.78 and 345,636.72 is: 477,017.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,251.60 : 857,397.78 = 345,636.72 : x
  2. Step 2: Convert to fraction form
    621,251.60/857,397.78 = 345,636.72/x
  3. Step 3: Cross multiply
    621,251.60x = 857,397.78 × 345,636.72
  4. Step 4: Simplify right side
    621,251.60x = 296,348,156,414.48
  5. Step 5: Solve for x
    x = 296,348,156,414.48/621,251.60
  6. Step 6: Final answer
    x = 477,017.94

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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.