Home / 2,987.22-4,123.43-1,728.84

Finding the Fourth Proportional to 2,987.22, 4,123.43 and 1,728.84

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Solution

The fourth proportional to 2,987.22, 4,123.43 and 1,728.84 is: 2,386.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.22 : 4,123.43 = 1,728.84 : x
  2. Step 2: Convert to fraction form
    2,987.22/4,123.43 = 1,728.84/x
  3. Step 3: Cross multiply
    2,987.22x = 4,123.43 × 1,728.84
  4. Step 4: Simplify right side
    2,987.22x = 7,128,761.31
  5. Step 5: Solve for x
    x = 7,128,761.31/2,987.22
  6. Step 6: Final answer
    x = 2,386.42

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1.5x scale

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.