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Finding the Fourth Proportional to 742.83, 1,119.20 and 672.51

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Solution

The fourth proportional to 742.83, 1,119.20 and 672.51 is: 1,013.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.83 : 1,119.20 = 672.51 : x
  2. Step 2: Convert to fraction form
    742.83/1,119.20 = 672.51/x
  3. Step 3: Cross multiply
    742.83x = 1,119.20 × 672.51
  4. Step 4: Simplify right side
    742.83x = 752,674.03
  5. Step 5: Solve for x
    x = 752,674.03/742.83
  6. Step 6: Final answer
    x = 1,013.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.