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Finding the Fourth Proportional to 580,383.20, 870,721.68 and 281,007.20

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Solution

The fourth proportional to 580,383.20, 870,721.68 and 281,007.20 is: 421,581.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,383.20 : 870,721.68 = 281,007.20 : x
  2. Step 2: Convert to fraction form
    580,383.20/870,721.68 = 281,007.20/x
  3. Step 3: Cross multiply
    580,383.20x = 870,721.68 × 281,007.20
  4. Step 4: Simplify right side
    580,383.20x = 244,679,061,276.10
  5. Step 5: Solve for x
    x = 244,679,061,276.10/580,383.20
  6. Step 6: Final answer
    x = 421,581.92

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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.