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Finding the Fourth Proportional to 925.77, 1,275.51 and 728.94

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Solution

The fourth proportional to 925.77, 1,275.51 and 728.94 is: 1,004.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.77 : 1,275.51 = 728.94 : x
  2. Step 2: Convert to fraction form
    925.77/1,275.51 = 728.94/x
  3. Step 3: Cross multiply
    925.77x = 1,275.51 × 728.94
  4. Step 4: Simplify right side
    925.77x = 929,770.26
  5. Step 5: Solve for x
    x = 929,770.26/925.77
  6. Step 6: Final answer
    x = 1,004.32

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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.