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Finding the Fourth Proportional to 489.29, 732.52 and 380.75

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Solution

The fourth proportional to 489.29, 732.52 and 380.75 is: 570.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.29 : 732.52 = 380.75 : x
  2. Step 2: Convert to fraction form
    489.29/732.52 = 380.75/x
  3. Step 3: Cross multiply
    489.29x = 732.52 × 380.75
  4. Step 4: Simplify right side
    489.29x = 278,908.82
  5. Step 5: Solve for x
    x = 278,908.82/489.29
  6. Step 6: Final answer
    x = 570.02

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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.