Home / 728,805.70-1,005,753.40-406,507.50

Finding the Fourth Proportional to 728,805.70, 1,005,753.40 and 406,507.50

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Solution

The fourth proportional to 728,805.70, 1,005,753.40 and 406,507.50 is: 560,981.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,805.70 : 1,005,753.40 = 406,507.50 : x
  2. Step 2: Convert to fraction form
    728,805.70/1,005,753.40 = 406,507.50/x
  3. Step 3: Cross multiply
    728,805.70x = 1,005,753.40 × 406,507.50
  4. Step 4: Simplify right side
    728,805.70x = 408,846,300,250.50
  5. Step 5: Solve for x
    x = 408,846,300,250.50/728,805.70
  6. Step 6: Final answer
    x = 560,981.21

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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.