Home / 1,987.64-2,981.46-1,369.52

Finding the Fourth Proportional to 1,987.64, 2,981.46 and 1,369.52

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Solution

The fourth proportional to 1,987.64, 2,981.46 and 1,369.52 is: 2,054.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.64 : 2,981.46 = 1,369.52 : x
  2. Step 2: Convert to fraction form
    1,987.64/2,981.46 = 1,369.52/x
  3. Step 3: Cross multiply
    1,987.64x = 2,981.46 × 1,369.52
  4. Step 4: Simplify right side
    1,987.64x = 4,083,169.10
  5. Step 5: Solve for x
    x = 4,083,169.10/1,987.64
  6. Step 6: Final answer
    x = 2,054.28

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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.