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Finding the Fourth Proportional to 681.46, 1,017.27 and 630.74

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Solution

The fourth proportional to 681.46, 1,017.27 and 630.74 is: 941.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.46 : 1,017.27 = 630.74 : x
  2. Step 2: Convert to fraction form
    681.46/1,017.27 = 630.74/x
  3. Step 3: Cross multiply
    681.46x = 1,017.27 × 630.74
  4. Step 4: Simplify right side
    681.46x = 641,635.42
  5. Step 5: Solve for x
    x = 641,635.42/681.46
  6. Step 6: Final answer
    x = 941.56

Related Problems

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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.