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Finding the Fourth Proportional to 798.75, 1,102.28 and 488.25

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Solution

The fourth proportional to 798.75, 1,102.28 and 488.25 is: 673.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.75 : 1,102.28 = 488.25 : x
  2. Step 2: Convert to fraction form
    798.75/1,102.28 = 488.25/x
  3. Step 3: Cross multiply
    798.75x = 1,102.28 × 488.25
  4. Step 4: Simplify right side
    798.75x = 538,185.77
  5. Step 5: Solve for x
    x = 538,185.77/798.75
  6. Step 6: Final answer
    x = 673.79

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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.