Home / 1,988.52-2,745.78-1,778.31

Finding the Fourth Proportional to 1,988.52, 2,745.78 and 1,778.31

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Solution

The fourth proportional to 1,988.52, 2,745.78 and 1,778.31 is: 2,455.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.52 : 2,745.78 = 1,778.31 : x
  2. Step 2: Convert to fraction form
    1,988.52/2,745.78 = 1,778.31/x
  3. Step 3: Cross multiply
    1,988.52x = 2,745.78 × 1,778.31
  4. Step 4: Simplify right side
    1,988.52x = 4,882,848.03
  5. Step 5: Solve for x
    x = 4,882,848.03/1,988.52
  6. Step 6: Final answer
    x = 2,455.52

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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.