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Finding the Fourth Proportional to 835,622.40, 1,253,640.96 and 391,872

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Solution

The fourth proportional to 835,622.40, 1,253,640.96 and 391,872 is: 587,905.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    835,622.40 : 1,253,640.96 = 391,872 : x
  2. Step 2: Convert to fraction form
    835,622.40/1,253,640.96 = 391,872/x
  3. Step 3: Cross multiply
    835,622.40x = 1,253,640.96 × 391,872
  4. Step 4: Simplify right side
    835,622.40x = 491,266,790,277.12
  5. Step 5: Solve for x
    x = 491,266,790,277.12/835,622.40
  6. Step 6: Final answer
    x = 587,905.24

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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.