Home / 1,098,005.40-1,647,008.10-721,306.80

Finding the Fourth Proportional to 1,098,005.40, 1,647,008.10 and 721,306.80

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Solution

The fourth proportional to 1,098,005.40, 1,647,008.10 and 721,306.80 is: 1,081,960.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098,005.40 : 1,647,008.10 = 721,306.80 : x
  2. Step 2: Convert to fraction form
    1,098,005.40/1,647,008.10 = 721,306.80/x
  3. Step 3: Cross multiply
    1,098,005.40x = 1,647,008.10 × 721,306.80
  4. Step 4: Simplify right side
    1,098,005.40x = 1,187,998,142,185.08
  5. Step 5: Solve for x
    x = 1,187,998,142,185.08/1,098,005.40
  6. Step 6: Final answer
    x = 1,081,960.20

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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.