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Finding the Fourth Proportional to 853,891.60, 1,280,863.32 and 292,918

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Solution

The fourth proportional to 853,891.60, 1,280,863.32 and 292,918 is: 439,385.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,891.60 : 1,280,863.32 = 292,918 : x
  2. Step 2: Convert to fraction form
    853,891.60/1,280,863.32 = 292,918/x
  3. Step 3: Cross multiply
    853,891.60x = 1,280,863.32 × 292,918
  4. Step 4: Simplify right side
    853,891.60x = 375,187,921,967.76
  5. Step 5: Solve for x
    x = 375,187,921,967.76/853,891.60
  6. Step 6: Final answer
    x = 439,385.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.