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Finding the Fourth Proportional to 821,651.20, 1,230,403.20 and 655,763.20

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Solution

The fourth proportional to 821,651.20, 1,230,403.20 and 655,763.20 is: 981,989.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,651.20 : 1,230,403.20 = 655,763.20 : x
  2. Step 2: Convert to fraction form
    821,651.20/1,230,403.20 = 655,763.20/x
  3. Step 3: Cross multiply
    821,651.20x = 1,230,403.20 × 655,763.20
  4. Step 4: Simplify right side
    821,651.20x = 806,853,139,722.24
  5. Step 5: Solve for x
    x = 806,853,139,722.24/821,651.20
  6. Step 6: Final answer
    x = 981,989.85

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1.5x scale

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.