Home / 2,643.75-3,963.40-1,325.88

Finding the Fourth Proportional to 2,643.75, 3,963.40 and 1,325.88

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Solution

The fourth proportional to 2,643.75, 3,963.40 and 1,325.88 is: 1,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.75 : 3,963.40 = 1,325.88 : x
  2. Step 2: Convert to fraction form
    2,643.75/3,963.40 = 1,325.88/x
  3. Step 3: Cross multiply
    2,643.75x = 3,963.40 × 1,325.88
  4. Step 4: Simplify right side
    2,643.75x = 5,254,992.79
  5. Step 5: Solve for x
    x = 5,254,992.79/2,643.75
  6. Step 6: Final answer
    x = 1,987.70

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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.