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Finding the Fourth Proportional to 948.41, 1,308.31 and 616.71

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Solution

The fourth proportional to 948.41, 1,308.31 and 616.71 is: 850.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.41 : 1,308.31 = 616.71 : x
  2. Step 2: Convert to fraction form
    948.41/1,308.31 = 616.71/x
  3. Step 3: Cross multiply
    948.41x = 1,308.31 × 616.71
  4. Step 4: Simplify right side
    948.41x = 806,847.86
  5. Step 5: Solve for x
    x = 806,847.86/948.41
  6. Step 6: Final answer
    x = 850.74

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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.