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Finding the Fourth Proportional to 833.18, 1,248.78 and 627.08

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Solution

The fourth proportional to 833.18, 1,248.78 and 627.08 is: 939.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.18 : 1,248.78 = 627.08 : x
  2. Step 2: Convert to fraction form
    833.18/1,248.78 = 627.08/x
  3. Step 3: Cross multiply
    833.18x = 1,248.78 × 627.08
  4. Step 4: Simplify right side
    833.18x = 783,081.07
  5. Step 5: Solve for x
    x = 783,081.07/833.18
  6. Step 6: Final answer
    x = 939.88

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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.