Home / 2,753.19-4,128.65-1,109.30

Finding the Fourth Proportional to 2,753.19, 4,128.65 and 1,109.30

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Solution

The fourth proportional to 2,753.19, 4,128.65 and 1,109.30 is: 1,663.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,753.19 : 4,128.65 = 1,109.30 : x
  2. Step 2: Convert to fraction form
    2,753.19/4,128.65 = 1,109.30/x
  3. Step 3: Cross multiply
    2,753.19x = 4,128.65 × 1,109.30
  4. Step 4: Simplify right side
    2,753.19x = 4,579,886.30
  5. Step 5: Solve for x
    x = 4,579,886.30/2,753.19
  6. Step 6: Final answer
    x = 1,663.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.