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Finding the Fourth Proportional to 811.08, 1,119.81 and 531.69

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Solution

The fourth proportional to 811.08, 1,119.81 and 531.69 is: 734.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.08 : 1,119.81 = 531.69 : x
  2. Step 2: Convert to fraction form
    811.08/1,119.81 = 531.69/x
  3. Step 3: Cross multiply
    811.08x = 1,119.81 × 531.69
  4. Step 4: Simplify right side
    811.08x = 595,391.78
  5. Step 5: Solve for x
    x = 595,391.78/811.08
  6. Step 6: Final answer
    x = 734.07

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Double scale
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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.