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Finding the Fourth Proportional to 642,846.24, 887,067.90 and 356,341.86

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Solution

The fourth proportional to 642,846.24, 887,067.90 and 356,341.86 is: 491,718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,846.24 : 887,067.90 = 356,341.86 : x
  2. Step 2: Convert to fraction form
    642,846.24/887,067.90 = 356,341.86/x
  3. Step 3: Cross multiply
    642,846.24x = 887,067.90 × 356,341.86
  4. Step 4: Simplify right side
    642,846.24x = 316,099,425,432.29
  5. Step 5: Solve for x
    x = 316,099,425,432.29/642,846.24
  6. Step 6: Final answer
    x = 491,718.56

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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.