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Finding the Fourth Proportional to 263.63, 363.81 and 147.20

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Solution

The fourth proportional to 263.63, 363.81 and 147.20 is: 203.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.63 : 363.81 = 147.20 : x
  2. Step 2: Convert to fraction form
    263.63/363.81 = 147.20/x
  3. Step 3: Cross multiply
    263.63x = 363.81 × 147.20
  4. Step 4: Simplify right side
    263.63x = 53,551.01
  5. Step 5: Solve for x
    x = 53,551.01/263.63
  6. Step 6: Final answer
    x = 203.13

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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.