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Finding the Fourth Proportional to 489.00, 732.47 and 215.28

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Solution

The fourth proportional to 489.00, 732.47 and 215.28 is: 322.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.00 : 732.47 = 215.28 : x
  2. Step 2: Convert to fraction form
    489.00/732.47 = 215.28/x
  3. Step 3: Cross multiply
    489.00x = 732.47 × 215.28
  4. Step 4: Simplify right side
    489.00x = 157,689.09
  5. Step 5: Solve for x
    x = 157,689.09/489.00
  6. Step 6: Final answer
    x = 322.47

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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.