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Finding the Fourth Proportional to 925.12, 1,277.40 and 571.56

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Solution

The fourth proportional to 925.12, 1,277.40 and 571.56 is: 789.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.12 : 1,277.40 = 571.56 : x
  2. Step 2: Convert to fraction form
    925.12/1,277.40 = 571.56/x
  3. Step 3: Cross multiply
    925.12x = 1,277.40 × 571.56
  4. Step 4: Simplify right side
    925.12x = 730,108.10
  5. Step 5: Solve for x
    x = 730,108.10/925.12
  6. Step 6: Final answer
    x = 789.20

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1.5x scale

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.