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Finding the Fourth Proportional to 304.31, 456.56 and 141.90

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Solution

The fourth proportional to 304.31, 456.56 and 141.90 is: 212.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.31 : 456.56 = 141.90 : x
  2. Step 2: Convert to fraction form
    304.31/456.56 = 141.90/x
  3. Step 3: Cross multiply
    304.31x = 456.56 × 141.90
  4. Step 4: Simplify right side
    304.31x = 64,785.86
  5. Step 5: Solve for x
    x = 64,785.86/304.31
  6. Step 6: Final answer
    x = 212.89

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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.