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Finding the Fourth Proportional to 280,605.92, 420,930.72 and 93,617.28

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Solution

The fourth proportional to 280,605.92, 420,930.72 and 93,617.28 is: 140,433.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,605.92 : 420,930.72 = 93,617.28 : x
  2. Step 2: Convert to fraction form
    280,605.92/420,930.72 = 93,617.28/x
  3. Step 3: Cross multiply
    280,605.92x = 420,930.72 × 93,617.28
  4. Step 4: Simplify right side
    280,605.92x = 39,406,389,074.84
  5. Step 5: Solve for x
    x = 39,406,389,074.84/280,605.92
  6. Step 6: Final answer
    x = 140,433.21

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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.