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Finding the Fourth Proportional to 732.50, 1,015.09 and 718.66

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Solution

The fourth proportional to 732.50, 1,015.09 and 718.66 is: 995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.50 : 1,015.09 = 718.66 : x
  2. Step 2: Convert to fraction form
    732.50/1,015.09 = 718.66/x
  3. Step 3: Cross multiply
    732.50x = 1,015.09 × 718.66
  4. Step 4: Simplify right side
    732.50x = 729,498.34
  5. Step 5: Solve for x
    x = 729,498.34/732.50
  6. Step 6: Final answer
    x = 995.90

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.