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Finding the Fourth Proportional to 260,997.30, 392,079.15 and 253,998.90

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Solution

The fourth proportional to 260,997.30, 392,079.15 and 253,998.90 is: 381,565.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,997.30 : 392,079.15 = 253,998.90 : x
  2. Step 2: Convert to fraction form
    260,997.30/392,079.15 = 253,998.90/x
  3. Step 3: Cross multiply
    260,997.30x = 392,079.15 × 253,998.90
  4. Step 4: Simplify right side
    260,997.30x = 99,587,672,812.94
  5. Step 5: Solve for x
    x = 99,587,672,812.94/260,997.30
  6. Step 6: Final answer
    x = 381,565.91

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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.