Home / 403,621.60-605,432.40-261,695.20

Finding the Fourth Proportional to 403,621.60, 605,432.40 and 261,695.20

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Solution

The fourth proportional to 403,621.60, 605,432.40 and 261,695.20 is: 392,542.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,621.60 : 605,432.40 = 261,695.20 : x
  2. Step 2: Convert to fraction form
    403,621.60/605,432.40 = 261,695.20/x
  3. Step 3: Cross multiply
    403,621.60x = 605,432.40 × 261,695.20
  4. Step 4: Simplify right side
    403,621.60x = 158,438,753,004.48
  5. Step 5: Solve for x
    x = 158,438,753,004.48/403,621.60
  6. Step 6: Final answer
    x = 392,542.80

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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.