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Finding the Fourth Proportional to 280,296.18, 420,381.18 and 80,572.02

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Solution

The fourth proportional to 280,296.18, 420,381.18 and 80,572.02 is: 120,839.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,296.18 : 420,381.18 = 80,572.02 : x
  2. Step 2: Convert to fraction form
    280,296.18/420,381.18 = 80,572.02/x
  3. Step 3: Cross multiply
    280,296.18x = 420,381.18 × 80,572.02
  4. Step 4: Simplify right side
    280,296.18x = 33,870,960,842.58
  5. Step 5: Solve for x
    x = 33,870,960,842.58/280,296.18
  6. Step 6: Final answer
    x = 120,839.89

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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.