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Finding the Fourth Proportional to 721.95, 995.68 and 469.94

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Solution

The fourth proportional to 721.95, 995.68 and 469.94 is: 648.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.95 : 995.68 = 469.94 : x
  2. Step 2: Convert to fraction form
    721.95/995.68 = 469.94/x
  3. Step 3: Cross multiply
    721.95x = 995.68 × 469.94
  4. Step 4: Simplify right side
    721.95x = 467,909.86
  5. Step 5: Solve for x
    x = 467,909.86/721.95
  6. Step 6: Final answer
    x = 648.12

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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.