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Finding the Fourth Proportional to 721.29, 995.03 and 693.35

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Solution

The fourth proportional to 721.29, 995.03 and 693.35 is: 956.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.29 : 995.03 = 693.35 : x
  2. Step 2: Convert to fraction form
    721.29/995.03 = 693.35/x
  3. Step 3: Cross multiply
    721.29x = 995.03 × 693.35
  4. Step 4: Simplify right side
    721.29x = 689,895.61
  5. Step 5: Solve for x
    x = 689,895.61/721.29
  6. Step 6: Final answer
    x = 956.47

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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.