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Finding the Fourth Proportional to 867.20, 1,196.68 and 474.22

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Solution

The fourth proportional to 867.20, 1,196.68 and 474.22 is: 654.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.20 : 1,196.68 = 474.22 : x
  2. Step 2: Convert to fraction form
    867.20/1,196.68 = 474.22/x
  3. Step 3: Cross multiply
    867.20x = 1,196.68 × 474.22
  4. Step 4: Simplify right side
    867.20x = 567,481.24
  5. Step 5: Solve for x
    x = 567,481.24/867.20
  6. Step 6: Final answer
    x = 654.38

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Double scale
Find fourth proportional to 868.20, 1,198.05 and 475.22
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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.