Home / 728,697.56-1,005,604.42-406,428.53

Finding the Fourth Proportional to 728,697.56, 1,005,604.42 and 406,428.53

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Solution

The fourth proportional to 728,697.56, 1,005,604.42 and 406,428.53 is: 560,872.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,697.56 : 1,005,604.42 = 406,428.53 : x
  2. Step 2: Convert to fraction form
    728,697.56/1,005,604.42 = 406,428.53/x
  3. Step 3: Cross multiply
    728,697.56x = 1,005,604.42 × 406,428.53
  4. Step 4: Simplify right side
    728,697.56x = 408,706,326,182.10
  5. Step 5: Solve for x
    x = 408,706,326,182.10/728,697.56
  6. Step 6: Final answer
    x = 560,872.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.