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Finding the Fourth Proportional to 492.67, 738.79 and 145.89

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Solution

The fourth proportional to 492.67, 738.79 and 145.89 is: 218.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.67 : 738.79 = 145.89 : x
  2. Step 2: Convert to fraction form
    492.67/738.79 = 145.89/x
  3. Step 3: Cross multiply
    492.67x = 738.79 × 145.89
  4. Step 4: Simplify right side
    492.67x = 107,781.71
  5. Step 5: Solve for x
    x = 107,781.71/492.67
  6. Step 6: Final answer
    x = 218.77

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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.