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Finding the Fourth Proportional to 948.57, 1,308.13 and 616.62

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Solution

The fourth proportional to 948.57, 1,308.13 and 616.62 is: 850.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.57 : 1,308.13 = 616.62 : x
  2. Step 2: Convert to fraction form
    948.57/1,308.13 = 616.62/x
  3. Step 3: Cross multiply
    948.57x = 1,308.13 × 616.62
  4. Step 4: Simplify right side
    948.57x = 806,619.12
  5. Step 5: Solve for x
    x = 806,619.12/948.57
  6. Step 6: Final answer
    x = 850.35

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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.