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Finding the Fourth Proportional to 717.03, 989.43 and 402.24

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Solution

The fourth proportional to 717.03, 989.43 and 402.24 is: 555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.03 : 989.43 = 402.24 : x
  2. Step 2: Convert to fraction form
    717.03/989.43 = 402.24/x
  3. Step 3: Cross multiply
    717.03x = 989.43 × 402.24
  4. Step 4: Simplify right side
    717.03x = 397,988.32
  5. Step 5: Solve for x
    x = 397,988.32/717.03
  6. Step 6: Final answer
    x = 555.05

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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.