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Finding the Fourth Proportional to 2,634.64, 3,952.19 and 686.84

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Solution

The fourth proportional to 2,634.64, 3,952.19 and 686.84 is: 1,030.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,634.64 : 3,952.19 = 686.84 : x
  2. Step 2: Convert to fraction form
    2,634.64/3,952.19 = 686.84/x
  3. Step 3: Cross multiply
    2,634.64x = 3,952.19 × 686.84
  4. Step 4: Simplify right side
    2,634.64x = 2,714,522.18
  5. Step 5: Solve for x
    x = 2,714,522.18/2,634.64
  6. Step 6: Final answer
    x = 1,030.32

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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.