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Finding the Fourth Proportional to 642,354.56, 886,414.36 and 355,857.56

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Solution

The fourth proportional to 642,354.56, 886,414.36 and 355,857.56 is: 491,064.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,354.56 : 886,414.36 = 355,857.56 : x
  2. Step 2: Convert to fraction form
    642,354.56/886,414.36 = 355,857.56/x
  3. Step 3: Cross multiply
    642,354.56x = 886,414.36 × 355,857.56
  4. Step 4: Simplify right side
    642,354.56x = 315,437,251,298.56
  5. Step 5: Solve for x
    x = 315,437,251,298.56/642,354.56
  6. Step 6: Final answer
    x = 491,064.08

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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.