Home / 1,987.54-2,745.14-1,590.58

Finding the Fourth Proportional to 1,987.54, 2,745.14 and 1,590.58

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Solution

The fourth proportional to 1,987.54, 2,745.14 and 1,590.58 is: 2,196.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.54 : 2,745.14 = 1,590.58 : x
  2. Step 2: Convert to fraction form
    1,987.54/2,745.14 = 1,590.58/x
  3. Step 3: Cross multiply
    1,987.54x = 2,745.14 × 1,590.58
  4. Step 4: Simplify right side
    1,987.54x = 4,366,364.78
  5. Step 5: Solve for x
    x = 4,366,364.78/1,987.54
  6. Step 6: Final answer
    x = 2,196.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.