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Finding the Fourth Proportional to 720,129.24, 1,080,871.83 and 365,397.84

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Solution

The fourth proportional to 720,129.24, 1,080,871.83 and 365,397.84 is: 548,440.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,129.24 : 1,080,871.83 = 365,397.84 : x
  2. Step 2: Convert to fraction form
    720,129.24/1,080,871.83 = 365,397.84/x
  3. Step 3: Cross multiply
    720,129.24x = 1,080,871.83 × 365,397.84
  4. Step 4: Simplify right side
    720,129.24x = 394,948,231,998.85
  5. Step 5: Solve for x
    x = 394,948,231,998.85/720,129.24
  6. Step 6: Final answer
    x = 548,440.77

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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.