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Finding the Fourth Proportional to 489.04, 733.56 and 215.13

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Solution

The fourth proportional to 489.04, 733.56 and 215.13 is: 322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.04 : 733.56 = 215.13 : x
  2. Step 2: Convert to fraction form
    489.04/733.56 = 215.13/x
  3. Step 3: Cross multiply
    489.04x = 733.56 × 215.13
  4. Step 4: Simplify right side
    489.04x = 157,810.76
  5. Step 5: Solve for x
    x = 157,810.76/489.04
  6. Step 6: Final answer
    x = 322.70

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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.