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Finding the Fourth Proportional to 981,740.80, 1,472,611.20 and 509,348.80

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Solution

The fourth proportional to 981,740.80, 1,472,611.20 and 509,348.80 is: 764,023.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,740.80 : 1,472,611.20 = 509,348.80 : x
  2. Step 2: Convert to fraction form
    981,740.80/1,472,611.20 = 509,348.80/x
  3. Step 3: Cross multiply
    981,740.80x = 1,472,611.20 × 509,348.80
  4. Step 4: Simplify right side
    981,740.80x = 750,072,747,586.56
  5. Step 5: Solve for x
    x = 750,072,747,586.56/981,740.80
  6. Step 6: Final answer
    x = 764,023.20

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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.