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Finding the Fourth Proportional to 259,489.00, 389,298.30 and 72,498.88

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Solution

The fourth proportional to 259,489.00, 389,298.30 and 72,498.88 is: 108,766.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,489.00 : 389,298.30 = 72,498.88 : x
  2. Step 2: Convert to fraction form
    259,489.00/389,298.30 = 72,498.88/x
  3. Step 3: Cross multiply
    259,489.00x = 389,298.30 × 72,498.88
  4. Step 4: Simplify right side
    259,489.00x = 28,223,688,426.92
  5. Step 5: Solve for x
    x = 28,223,688,426.92/259,489.00
  6. Step 6: Final answer
    x = 108,766.42

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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.