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Finding the Fourth Proportional to 925.34, 1,275.18 and 768.20

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Solution

The fourth proportional to 925.34, 1,275.18 and 768.20 is: 1,058.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.34 : 1,275.18 = 768.20 : x
  2. Step 2: Convert to fraction form
    925.34/1,275.18 = 768.20/x
  3. Step 3: Cross multiply
    925.34x = 1,275.18 × 768.20
  4. Step 4: Simplify right side
    925.34x = 979,593.28
  5. Step 5: Solve for x
    x = 979,593.28/925.34
  6. Step 6: Final answer
    x = 1,058.63

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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.