Home / 2,634.12-3,951.42-686.34

Finding the Fourth Proportional to 2,634.12, 3,951.42 and 686.34

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Solution

The fourth proportional to 2,634.12, 3,951.42 and 686.34 is: 1,029.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,634.12 : 3,951.42 = 686.34 : x
  2. Step 2: Convert to fraction form
    2,634.12/3,951.42 = 686.34/x
  3. Step 3: Cross multiply
    2,634.12x = 3,951.42 × 686.34
  4. Step 4: Simplify right side
    2,634.12x = 2,712,017.60
  5. Step 5: Solve for x
    x = 2,712,017.60/2,634.12
  6. Step 6: Final answer
    x = 1,029.57

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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.