Home / 3,419.55-5,129.33-1,111.05

Finding the Fourth Proportional to 3,419.55, 5,129.33 and 1,111.05

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Solution

The fourth proportional to 3,419.55, 5,129.33 and 1,111.05 is: 1,666.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,419.55 : 5,129.33 = 1,111.05 : x
  2. Step 2: Convert to fraction form
    3,419.55/5,129.33 = 1,111.05/x
  3. Step 3: Cross multiply
    3,419.55x = 5,129.33 × 1,111.05
  4. Step 4: Simplify right side
    3,419.55x = 5,698,942.10
  5. Step 5: Solve for x
    x = 5,698,942.10/3,419.55
  6. Step 6: Final answer
    x = 1,666.58

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Double scale
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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.