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Finding the Fourth Proportional to 681.30, 1,016.99 and 630.57

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Solution

The fourth proportional to 681.30, 1,016.99 and 630.57 is: 941.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.30 : 1,016.99 = 630.57 : x
  2. Step 2: Convert to fraction form
    681.30/1,016.99 = 630.57/x
  3. Step 3: Cross multiply
    681.30x = 1,016.99 × 630.57
  4. Step 4: Simplify right side
    681.30x = 641,280.23
  5. Step 5: Solve for x
    x = 641,280.23/681.30
  6. Step 6: Final answer
    x = 941.26

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.