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Finding the Fourth Proportional to 833.81, 1,149.93 and 709.88

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Solution

The fourth proportional to 833.81, 1,149.93 and 709.88 is: 979.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.81 : 1,149.93 = 709.88 : x
  2. Step 2: Convert to fraction form
    833.81/1,149.93 = 709.88/x
  3. Step 3: Cross multiply
    833.81x = 1,149.93 × 709.88
  4. Step 4: Simplify right side
    833.81x = 816,306.56
  5. Step 5: Solve for x
    x = 816,306.56/833.81
  6. Step 6: Final answer
    x = 979.01

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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.