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Finding the Fourth Proportional to 280,491.92, 420,890.96 and 162,393.92

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Solution

The fourth proportional to 280,491.92, 420,890.96 and 162,393.92 is: 243,679.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,491.92 : 420,890.96 = 162,393.92 : x
  2. Step 2: Convert to fraction form
    280,491.92/420,890.96 = 162,393.92/x
  3. Step 3: Cross multiply
    280,491.92x = 420,890.96 × 162,393.92
  4. Step 4: Simplify right side
    280,491.92x = 68,350,132,886.96
  5. Step 5: Solve for x
    x = 68,350,132,886.96/280,491.92
  6. Step 6: Final answer
    x = 243,679.51

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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.