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Finding the Fourth Proportional to 265.12, 397.74 and 143.38

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Solution

The fourth proportional to 265.12, 397.74 and 143.38 is: 215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.12 : 397.74 = 143.38 : x
  2. Step 2: Convert to fraction form
    265.12/397.74 = 143.38/x
  3. Step 3: Cross multiply
    265.12x = 397.74 × 143.38
  4. Step 4: Simplify right side
    265.12x = 57,027.96
  5. Step 5: Solve for x
    x = 57,027.96/265.12
  6. Step 6: Final answer
    x = 215.10

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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.