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Finding the Fourth Proportional to 948.52, 1,306.92 and 686.08

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Solution

The fourth proportional to 948.52, 1,306.92 and 686.08 is: 945.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.52 : 1,306.92 = 686.08 : x
  2. Step 2: Convert to fraction form
    948.52/1,306.92 = 686.08/x
  3. Step 3: Cross multiply
    948.52x = 1,306.92 × 686.08
  4. Step 4: Simplify right side
    948.52x = 896,651.67
  5. Step 5: Solve for x
    x = 896,651.67/948.52
  6. Step 6: Final answer
    x = 945.32

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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.