Home / 1,988.80-2,745.12-1,326.16

Finding the Fourth Proportional to 1,988.80, 2,745.12 and 1,326.16

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Solution

The fourth proportional to 1,988.80, 2,745.12 and 1,326.16 is: 1,830.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.80 : 2,745.12 = 1,326.16 : x
  2. Step 2: Convert to fraction form
    1,988.80/2,745.12 = 1,326.16/x
  3. Step 3: Cross multiply
    1,988.80x = 2,745.12 × 1,326.16
  4. Step 4: Simplify right side
    1,988.80x = 3,640,468.34
  5. Step 5: Solve for x
    x = 3,640,468.34/1,988.80
  6. Step 6: Final answer
    x = 1,830.48

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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.