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Finding the Fourth Proportional to 723.01, 995.49 and 638.92

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Solution

The fourth proportional to 723.01, 995.49 and 638.92 is: 879.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.01 : 995.49 = 638.92 : x
  2. Step 2: Convert to fraction form
    723.01/995.49 = 638.92/x
  3. Step 3: Cross multiply
    723.01x = 995.49 × 638.92
  4. Step 4: Simplify right side
    723.01x = 636,039.72
  5. Step 5: Solve for x
    x = 636,039.72/723.01
  6. Step 6: Final answer
    x = 879.71

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1.5x scale

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.