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Finding the Fourth Proportional to 305.62, 458.33 and 89.21

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Solution

The fourth proportional to 305.62, 458.33 and 89.21 is: 133.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.62 : 458.33 = 89.21 : x
  2. Step 2: Convert to fraction form
    305.62/458.33 = 89.21/x
  3. Step 3: Cross multiply
    305.62x = 458.33 × 89.21
  4. Step 4: Simplify right side
    305.62x = 40,888.99
  5. Step 5: Solve for x
    x = 40,888.99/305.62
  6. Step 6: Final answer
    x = 133.79

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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.