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Finding the Fourth Proportional to 723.11, 1,079.24 and 665.39

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Solution

The fourth proportional to 723.11, 1,079.24 and 665.39 is: 993.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.11 : 1,079.24 = 665.39 : x
  2. Step 2: Convert to fraction form
    723.11/1,079.24 = 665.39/x
  3. Step 3: Cross multiply
    723.11x = 1,079.24 × 665.39
  4. Step 4: Simplify right side
    723.11x = 718,106.78
  5. Step 5: Solve for x
    x = 718,106.78/723.11
  6. Step 6: Final answer
    x = 993.09

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.