Home / 1,388.40-2,085.48-1,101.84

Finding the Fourth Proportional to 1,388.40, 2,085.48 and 1,101.84

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Solution

The fourth proportional to 1,388.40, 2,085.48 and 1,101.84 is: 1,655.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.40 : 2,085.48 = 1,101.84 : x
  2. Step 2: Convert to fraction form
    1,388.40/2,085.48 = 1,101.84/x
  3. Step 3: Cross multiply
    1,388.40x = 2,085.48 × 1,101.84
  4. Step 4: Simplify right side
    1,388.40x = 2,297,865.28
  5. Step 5: Solve for x
    x = 2,297,865.28/1,388.40
  6. Step 6: Final answer
    x = 1,655.05

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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.