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Finding the Fourth Proportional to 717.12, 989.33 and 437.30

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Solution

The fourth proportional to 717.12, 989.33 and 437.30 is: 603.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.12 : 989.33 = 437.30 : x
  2. Step 2: Convert to fraction form
    717.12/989.33 = 437.30/x
  3. Step 3: Cross multiply
    717.12x = 989.33 × 437.30
  4. Step 4: Simplify right side
    717.12x = 432,630.59
  5. Step 5: Solve for x
    x = 432,630.59/717.12
  6. Step 6: Final answer
    x = 603.29

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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.