Home / 3,429.60-5,144.40-1,121.10

Finding the Fourth Proportional to 3,429.60, 5,144.40 and 1,121.10

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Solution

The fourth proportional to 3,429.60, 5,144.40 and 1,121.10 is: 1,681.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,429.60 : 5,144.40 = 1,121.10 : x
  2. Step 2: Convert to fraction form
    3,429.60/5,144.40 = 1,121.10/x
  3. Step 3: Cross multiply
    3,429.60x = 5,144.40 × 1,121.10
  4. Step 4: Simplify right side
    3,429.60x = 5,767,386.84
  5. Step 5: Solve for x
    x = 5,767,386.84/3,429.60
  6. Step 6: Final answer
    x = 1,681.65

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Similar ratio
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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.