Home / 981,720.80-1,472,581.20-509,328.80

Finding the Fourth Proportional to 981,720.80, 1,472,581.20 and 509,328.80

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Solution

The fourth proportional to 981,720.80, 1,472,581.20 and 509,328.80 is: 763,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,720.80 : 1,472,581.20 = 509,328.80 : x
  2. Step 2: Convert to fraction form
    981,720.80/1,472,581.20 = 509,328.80/x
  3. Step 3: Cross multiply
    981,720.80x = 1,472,581.20 × 509,328.80
  4. Step 4: Simplify right side
    981,720.80x = 750,028,015,498.56
  5. Step 5: Solve for x
    x = 750,028,015,498.56/981,720.80
  6. Step 6: Final answer
    x = 763,993.20

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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.