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Finding the Fourth Proportional to 717.30, 989.20 and 468.54

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Solution

The fourth proportional to 717.30, 989.20 and 468.54 is: 646.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.30 : 989.20 = 468.54 : x
  2. Step 2: Convert to fraction form
    717.30/989.20 = 468.54/x
  3. Step 3: Cross multiply
    717.30x = 989.20 × 468.54
  4. Step 4: Simplify right side
    717.30x = 463,479.77
  5. Step 5: Solve for x
    x = 463,479.77/717.30
  6. Step 6: Final answer
    x = 646.14

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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.