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Finding the Fourth Proportional to 717.39, 989.46 and 468.81

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Solution

The fourth proportional to 717.39, 989.46 and 468.81 is: 646.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.39 : 989.46 = 468.81 : x
  2. Step 2: Convert to fraction form
    717.39/989.46 = 468.81/x
  3. Step 3: Cross multiply
    717.39x = 989.46 × 468.81
  4. Step 4: Simplify right side
    717.39x = 463,868.74
  5. Step 5: Solve for x
    x = 463,868.74/717.39
  6. Step 6: Final answer
    x = 646.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.