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Finding the Fourth Proportional to 489.21, 732.52 and 411.58

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Solution

The fourth proportional to 489.21, 732.52 and 411.58 is: 616.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.21 : 732.52 = 411.58 : x
  2. Step 2: Convert to fraction form
    489.21/732.52 = 411.58/x
  3. Step 3: Cross multiply
    489.21x = 732.52 × 411.58
  4. Step 4: Simplify right side
    489.21x = 301,490.58
  5. Step 5: Solve for x
    x = 301,490.58/489.21
  6. Step 6: Final answer
    x = 616.28

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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.