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Finding the Fourth Proportional to 812,707.92, 1,219,142 and 280,158.88

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Solution

The fourth proportional to 812,707.92, 1,219,142 and 280,158.88 is: 420,265.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,707.92 : 1,219,142 = 280,158.88 : x
  2. Step 2: Convert to fraction form
    812,707.92/1,219,142 = 280,158.88/x
  3. Step 3: Cross multiply
    812,707.92x = 1,219,142 × 280,158.88
  4. Step 4: Simplify right side
    812,707.92x = 341,553,457,280.96
  5. Step 5: Solve for x
    x = 341,553,457,280.96/812,707.92
  6. Step 6: Final answer
    x = 420,265.94

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1.5x scale

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.