Home / 728,745.28-1,005,665.15-402,049.40

Finding the Fourth Proportional to 728,745.28, 1,005,665.15 and 402,049.40

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Solution

The fourth proportional to 728,745.28, 1,005,665.15 and 402,049.40 is: 554,826.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,745.28 : 1,005,665.15 = 402,049.40 : x
  2. Step 2: Convert to fraction form
    728,745.28/1,005,665.15 = 402,049.40/x
  3. Step 3: Cross multiply
    728,745.28x = 1,005,665.15 × 402,049.40
  4. Step 4: Simplify right side
    728,745.28x = 404,327,070,158.41
  5. Step 5: Solve for x
    x = 404,327,070,158.41/728,745.28
  6. Step 6: Final answer
    x = 554,826.33

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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.