Home / 1,987.52-2,981.96-1,395.16

Finding the Fourth Proportional to 1,987.52, 2,981.96 and 1,395.16

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Solution

The fourth proportional to 1,987.52, 2,981.96 and 1,395.16 is: 2,093.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.52 : 2,981.96 = 1,395.16 : x
  2. Step 2: Convert to fraction form
    1,987.52/2,981.96 = 1,395.16/x
  3. Step 3: Cross multiply
    1,987.52x = 2,981.96 × 1,395.16
  4. Step 4: Simplify right side
    1,987.52x = 4,160,311.31
  5. Step 5: Solve for x
    x = 4,160,311.31/1,987.52
  6. Step 6: Final answer
    x = 2,093.22

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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.