Home / 1,320,772.40-1,981,158.60-689,539.40

Finding the Fourth Proportional to 1,320,772.40, 1,981,158.60 and 689,539.40

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Solution

The fourth proportional to 1,320,772.40, 1,981,158.60 and 689,539.40 is: 1,034,309.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,772.40 : 1,981,158.60 = 689,539.40 : x
  2. Step 2: Convert to fraction form
    1,320,772.40/1,981,158.60 = 689,539.40/x
  3. Step 3: Cross multiply
    1,320,772.40x = 1,981,158.60 × 689,539.40
  4. Step 4: Simplify right side
    1,320,772.40x = 1,366,086,912,348.84
  5. Step 5: Solve for x
    x = 1,366,086,912,348.84/1,320,772.40
  6. Step 6: Final answer
    x = 1,034,309.10

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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.