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Finding the Fourth Proportional to 691.29, 954.20 and 443.27

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Solution

The fourth proportional to 691.29, 954.20 and 443.27 is: 611.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.29 : 954.20 = 443.27 : x
  2. Step 2: Convert to fraction form
    691.29/954.20 = 443.27/x
  3. Step 3: Cross multiply
    691.29x = 954.20 × 443.27
  4. Step 4: Simplify right side
    691.29x = 422,968.40
  5. Step 5: Solve for x
    x = 422,968.40/691.29
  6. Step 6: Final answer
    x = 611.85

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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.