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Finding the Fourth Proportional to 717.01, 989.43 and 402.22

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Solution

The fourth proportional to 717.01, 989.43 and 402.22 is: 555.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.01 : 989.43 = 402.22 : x
  2. Step 2: Convert to fraction form
    717.01/989.43 = 402.22/x
  3. Step 3: Cross multiply
    717.01x = 989.43 × 402.22
  4. Step 4: Simplify right side
    717.01x = 397,968.53
  5. Step 5: Solve for x
    x = 397,968.53/717.01
  6. Step 6: Final answer
    x = 555.04

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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.