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Finding the Fourth Proportional to 426,407.46, 639,475.11 and 173,687.46

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Solution

The fourth proportional to 426,407.46, 639,475.11 and 173,687.46 is: 260,475.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,407.46 : 639,475.11 = 173,687.46 : x
  2. Step 2: Convert to fraction form
    426,407.46/639,475.11 = 173,687.46/x
  3. Step 3: Cross multiply
    426,407.46x = 639,475.11 × 173,687.46
  4. Step 4: Simplify right side
    426,407.46x = 111,068,807,589.12
  5. Step 5: Solve for x
    x = 111,068,807,589.12/426,407.46
  6. Step 6: Final answer
    x = 260,475.76

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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.