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Finding the Fourth Proportional to 288.01, 431.85 and 141.76

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Solution

The fourth proportional to 288.01, 431.85 and 141.76 is: 212.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.01 : 431.85 = 141.76 : x
  2. Step 2: Convert to fraction form
    288.01/431.85 = 141.76/x
  3. Step 3: Cross multiply
    288.01x = 431.85 × 141.76
  4. Step 4: Simplify right side
    288.01x = 61,219.06
  5. Step 5: Solve for x
    x = 61,219.06/288.01
  6. Step 6: Final answer
    x = 212.56

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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.