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Finding the Fourth Proportional to 946.13, 1,306.49 and 636.53

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Solution

The fourth proportional to 946.13, 1,306.49 and 636.53 is: 878.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.13 : 1,306.49 = 636.53 : x
  2. Step 2: Convert to fraction form
    946.13/1,306.49 = 636.53/x
  3. Step 3: Cross multiply
    946.13x = 1,306.49 × 636.53
  4. Step 4: Simplify right side
    946.13x = 831,616.90
  5. Step 5: Solve for x
    x = 831,616.90/946.13
  6. Step 6: Final answer
    x = 878.97

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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.