Home / 1,985.38-2,739.84-1,101.20

Finding the Fourth Proportional to 1,985.38, 2,739.84 and 1,101.20

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Solution

The fourth proportional to 1,985.38, 2,739.84 and 1,101.20 is: 1,519.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.38 : 2,739.84 = 1,101.20 : x
  2. Step 2: Convert to fraction form
    1,985.38/2,739.84 = 1,101.20/x
  3. Step 3: Cross multiply
    1,985.38x = 2,739.84 × 1,101.20
  4. Step 4: Simplify right side
    1,985.38x = 3,017,115.59
  5. Step 5: Solve for x
    x = 3,017,115.59/1,985.38
  6. Step 6: Final answer
    x = 1,519.67

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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.