Home / 1,987.48-2,742.06-1,324.45

Finding the Fourth Proportional to 1,987.48, 2,742.06 and 1,324.45

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Solution

The fourth proportional to 1,987.48, 2,742.06 and 1,324.45 is: 1,827.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.48 : 2,742.06 = 1,324.45 : x
  2. Step 2: Convert to fraction form
    1,987.48/2,742.06 = 1,324.45/x
  3. Step 3: Cross multiply
    1,987.48x = 2,742.06 × 1,324.45
  4. Step 4: Simplify right side
    1,987.48x = 3,631,721.37
  5. Step 5: Solve for x
    x = 3,631,721.37/1,987.48
  6. Step 6: Final answer
    x = 1,827.30

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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.