Home / 728,806.70-1,005,754.78-406,508.50

Finding the Fourth Proportional to 728,806.70, 1,005,754.78 and 406,508.50

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Solution

The fourth proportional to 728,806.70, 1,005,754.78 and 406,508.50 is: 560,982.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,806.70 : 1,005,754.78 = 406,508.50 : x
  2. Step 2: Convert to fraction form
    728,806.70/1,005,754.78 = 406,508.50/x
  3. Step 3: Cross multiply
    728,806.70x = 1,005,754.78 × 406,508.50
  4. Step 4: Simplify right side
    728,806.70x = 408,847,866,985.63
  5. Step 5: Solve for x
    x = 408,847,866,985.63/728,806.70
  6. Step 6: Final answer
    x = 560,982.59

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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.