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Finding the Fourth Proportional to 841.38, 1,161.96 and 749.70

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Solution

The fourth proportional to 841.38, 1,161.96 and 749.70 is: 1,035.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.38 : 1,161.96 = 749.70 : x
  2. Step 2: Convert to fraction form
    841.38/1,161.96 = 749.70/x
  3. Step 3: Cross multiply
    841.38x = 1,161.96 × 749.70
  4. Step 4: Simplify right side
    841.38x = 871,121.41
  5. Step 5: Solve for x
    x = 871,121.41/841.38
  6. Step 6: Final answer
    x = 1,035.35

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Double scale
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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.