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Finding the Fourth Proportional to 833.88, 1,247.83 and 787.03

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Solution

The fourth proportional to 833.88, 1,247.83 and 787.03 is: 1,177.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.88 : 1,247.83 = 787.03 : x
  2. Step 2: Convert to fraction form
    833.88/1,247.83 = 787.03/x
  3. Step 3: Cross multiply
    833.88x = 1,247.83 × 787.03
  4. Step 4: Simplify right side
    833.88x = 982,079.64
  5. Step 5: Solve for x
    x = 982,079.64/833.88
  6. Step 6: Final answer
    x = 1,177.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.