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Finding the Fourth Proportional to 925.58, 1,275.32 and 715.79

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Solution

The fourth proportional to 925.58, 1,275.32 and 715.79 is: 986.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.58 : 1,275.32 = 715.79 : x
  2. Step 2: Convert to fraction form
    925.58/1,275.32 = 715.79/x
  3. Step 3: Cross multiply
    925.58x = 1,275.32 × 715.79
  4. Step 4: Simplify right side
    925.58x = 912,856.72
  5. Step 5: Solve for x
    x = 912,856.72/925.58
  6. Step 6: Final answer
    x = 986.26

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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.