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Finding the Fourth Proportional to 665,079.20, 996,409.20 and 383,760.80

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Solution

The fourth proportional to 665,079.20, 996,409.20 and 383,760.80 is: 574,943.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,079.20 : 996,409.20 = 383,760.80 : x
  2. Step 2: Convert to fraction form
    665,079.20/996,409.20 = 383,760.80/x
  3. Step 3: Cross multiply
    665,079.20x = 996,409.20 × 383,760.80
  4. Step 4: Simplify right side
    665,079.20x = 382,382,791,719.36
  5. Step 5: Solve for x
    x = 382,382,791,719.36/665,079.20
  6. Step 6: Final answer
    x = 574,943.24

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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.