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Finding the Fourth Proportional to 2,191.70, 3,025.16 and 1,248

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Solution

The fourth proportional to 2,191.70, 3,025.16 and 1,248 is: 1,722.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.70 : 3,025.16 = 1,248 : x
  2. Step 2: Convert to fraction form
    2,191.70/3,025.16 = 1,248/x
  3. Step 3: Cross multiply
    2,191.70x = 3,025.16 × 1,248
  4. Step 4: Simplify right side
    2,191.70x = 3,775,393.44
  5. Step 5: Solve for x
    x = 3,775,393.44/2,191.70
  6. Step 6: Final answer
    x = 1,722.59

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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.