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Finding the Fourth Proportional to 486,911.20, 730,366.80 and 479,912.80

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Solution

The fourth proportional to 486,911.20, 730,366.80 and 479,912.80 is: 719,869.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,911.20 : 730,366.80 = 479,912.80 : x
  2. Step 2: Convert to fraction form
    486,911.20/730,366.80 = 479,912.80/x
  3. Step 3: Cross multiply
    486,911.20x = 730,366.80 × 479,912.80
  4. Step 4: Simplify right side
    486,911.20x = 350,512,376,015.04
  5. Step 5: Solve for x
    x = 350,512,376,015.04/486,911.20
  6. Step 6: Final answer
    x = 719,869.20

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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.