Home / 925.20-1,387.60-275.76

Finding the Fourth Proportional to 925.20, 1,387.60 and 275.76

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Solution

The fourth proportional to 925.20, 1,387.60 and 275.76 is: 413.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.20 : 1,387.60 = 275.76 : x
  2. Step 2: Convert to fraction form
    925.20/1,387.60 = 275.76/x
  3. Step 3: Cross multiply
    925.20x = 1,387.60 × 275.76
  4. Step 4: Simplify right side
    925.20x = 382,644.58
  5. Step 5: Solve for x
    x = 382,644.58/925.20
  6. Step 6: Final answer
    x = 413.58

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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.