Home / 1,985.25-2,738.16-1,672.20

Finding the Fourth Proportional to 1,985.25, 2,738.16 and 1,672.20

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Solution

The fourth proportional to 1,985.25, 2,738.16 and 1,672.20 is: 2,306.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.25 : 2,738.16 = 1,672.20 : x
  2. Step 2: Convert to fraction form
    1,985.25/2,738.16 = 1,672.20/x
  3. Step 3: Cross multiply
    1,985.25x = 2,738.16 × 1,672.20
  4. Step 4: Simplify right side
    1,985.25x = 4,578,751.15
  5. Step 5: Solve for x
    x = 4,578,751.15/1,985.25
  6. Step 6: Final answer
    x = 2,306.39

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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.