Home / 728,772.64-1,005,708.02-406,503.61

Finding the Fourth Proportional to 728,772.64, 1,005,708.02 and 406,503.61

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Solution

The fourth proportional to 728,772.64, 1,005,708.02 and 406,503.61 is: 560,975.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,772.64 : 1,005,708.02 = 406,503.61 : x
  2. Step 2: Convert to fraction form
    728,772.64/1,005,708.02 = 406,503.61/x
  3. Step 3: Cross multiply
    728,772.64x = 1,005,708.02 × 406,503.61
  4. Step 4: Simplify right side
    728,772.64x = 408,823,940,735.95
  5. Step 5: Solve for x
    x = 408,823,940,735.95/728,772.64
  6. Step 6: Final answer
    x = 560,975.97

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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.