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Finding the Fourth Proportional to 763.98, 1,145.97 and 632.76

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Solution

The fourth proportional to 763.98, 1,145.97 and 632.76 is: 949.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.98 : 1,145.97 = 632.76 : x
  2. Step 2: Convert to fraction form
    763.98/1,145.97 = 632.76/x
  3. Step 3: Cross multiply
    763.98x = 1,145.97 × 632.76
  4. Step 4: Simplify right side
    763.98x = 725,123.98
  5. Step 5: Solve for x
    x = 725,123.98/763.98
  6. Step 6: Final answer
    x = 949.14

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.