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Finding the Fourth Proportional to 426,253.76, 639,500.52 and 186,388.76

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Solution

The fourth proportional to 426,253.76, 639,500.52 and 186,388.76 is: 279,635.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,253.76 : 639,500.52 = 186,388.76 : x
  2. Step 2: Convert to fraction form
    426,253.76/639,500.52 = 186,388.76/x
  3. Step 3: Cross multiply
    426,253.76x = 639,500.52 × 186,388.76
  4. Step 4: Simplify right side
    426,253.76x = 119,195,708,942.16
  5. Step 5: Solve for x
    x = 119,195,708,942.16/426,253.76
  6. Step 6: Final answer
    x = 279,635.56

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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.