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Finding the Fourth Proportional to 305.92, 458.56 and 143.47

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Solution

The fourth proportional to 305.92, 458.56 and 143.47 is: 215.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.92 : 458.56 = 143.47 : x
  2. Step 2: Convert to fraction form
    305.92/458.56 = 143.47/x
  3. Step 3: Cross multiply
    305.92x = 458.56 × 143.47
  4. Step 4: Simplify right side
    305.92x = 65,789.60
  5. Step 5: Solve for x
    x = 65,789.60/305.92
  6. Step 6: Final answer
    x = 215.05

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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.