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Finding the Fourth Proportional to 431,337.30, 647,005.95 and 115,826.10

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Solution

The fourth proportional to 431,337.30, 647,005.95 and 115,826.10 is: 173,739.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,337.30 : 647,005.95 = 115,826.10 : x
  2. Step 2: Convert to fraction form
    431,337.30/647,005.95 = 115,826.10/x
  3. Step 3: Cross multiply
    431,337.30x = 647,005.95 × 115,826.10
  4. Step 4: Simplify right side
    431,337.30x = 74,940,175,865.30
  5. Step 5: Solve for x
    x = 74,940,175,865.30/431,337.30
  6. Step 6: Final answer
    x = 173,739.15

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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.