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Finding the Fourth Proportional to 1,211.24, 1,672.30 and 797.48

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Solution

The fourth proportional to 1,211.24, 1,672.30 and 797.48 is: 1,101.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.24 : 1,672.30 = 797.48 : x
  2. Step 2: Convert to fraction form
    1,211.24/1,672.30 = 797.48/x
  3. Step 3: Cross multiply
    1,211.24x = 1,672.30 × 797.48
  4. Step 4: Simplify right side
    1,211.24x = 1,333,625.80
  5. Step 5: Solve for x
    x = 1,333,625.80/1,211.24
  6. Step 6: Final answer
    x = 1,101.04

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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.