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Finding the Fourth Proportional to 691.45, 955.41 and 552.71

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Solution

The fourth proportional to 691.45, 955.41 and 552.71 is: 763.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.45 : 955.41 = 552.71 : x
  2. Step 2: Convert to fraction form
    691.45/955.41 = 552.71/x
  3. Step 3: Cross multiply
    691.45x = 955.41 × 552.71
  4. Step 4: Simplify right side
    691.45x = 528,067.33
  5. Step 5: Solve for x
    x = 528,067.33/691.45
  6. Step 6: Final answer
    x = 763.71

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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.