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Finding the Fourth Proportional to 486,916.80, 730,375.20 and 276,964.80

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Solution

The fourth proportional to 486,916.80, 730,375.20 and 276,964.80 is: 415,447.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,916.80 : 730,375.20 = 276,964.80 : x
  2. Step 2: Convert to fraction form
    486,916.80/730,375.20 = 276,964.80/x
  3. Step 3: Cross multiply
    486,916.80x = 730,375.20 × 276,964.80
  4. Step 4: Simplify right side
    486,916.80x = 202,288,221,192.96
  5. Step 5: Solve for x
    x = 202,288,221,192.96/486,916.80
  6. Step 6: Final answer
    x = 415,447.20

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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.