Home / 728,876.40-1,093,630.37-391,523.45

Finding the Fourth Proportional to 728,876.40, 1,093,630.37 and 391,523.45

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Solution

The fourth proportional to 728,876.40, 1,093,630.37 and 391,523.45 is: 587,454.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,876.40 : 1,093,630.37 = 391,523.45 : x
  2. Step 2: Convert to fraction form
    728,876.40/1,093,630.37 = 391,523.45/x
  3. Step 3: Cross multiply
    728,876.40x = 1,093,630.37 × 391,523.45
  4. Step 4: Simplify right side
    728,876.40x = 428,181,935,487.18
  5. Step 5: Solve for x
    x = 428,181,935,487.18/728,876.40
  6. Step 6: Final answer
    x = 587,454.79

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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.