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Finding the Fourth Proportional to 543.87, 815.81 and 133.01

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Solution

The fourth proportional to 543.87, 815.81 and 133.01 is: 199.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.87 : 815.81 = 133.01 : x
  2. Step 2: Convert to fraction form
    543.87/815.81 = 133.01/x
  3. Step 3: Cross multiply
    543.87x = 815.81 × 133.01
  4. Step 4: Simplify right side
    543.87x = 108,506.14
  5. Step 5: Solve for x
    x = 108,506.14/543.87
  6. Step 6: Final answer
    x = 199.51

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Double scale
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Similar ratio
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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.