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Finding the Fourth Proportional to 489.69, 731.66 and 472.68

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Solution

The fourth proportional to 489.69, 731.66 and 472.68 is: 706.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.69 : 731.66 = 472.68 : x
  2. Step 2: Convert to fraction form
    489.69/731.66 = 472.68/x
  3. Step 3: Cross multiply
    489.69x = 731.66 × 472.68
  4. Step 4: Simplify right side
    489.69x = 345,838.69
  5. Step 5: Solve for x
    x = 345,838.69/489.69
  6. Step 6: Final answer
    x = 706.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.