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Finding the Fourth Proportional to 981,343.80, 1,472,015.70 and 662,479.20

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Solution

The fourth proportional to 981,343.80, 1,472,015.70 and 662,479.20 is: 993,718.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,343.80 : 1,472,015.70 = 662,479.20 : x
  2. Step 2: Convert to fraction form
    981,343.80/1,472,015.70 = 662,479.20/x
  3. Step 3: Cross multiply
    981,343.80x = 1,472,015.70 × 662,479.20
  4. Step 4: Simplify right side
    981,343.80x = 975,179,783,323.44
  5. Step 5: Solve for x
    x = 975,179,783,323.44/981,343.80
  6. Step 6: Final answer
    x = 993,718.80

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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.