Home / 3,454.12-5,180.66-989.10

Finding the Fourth Proportional to 3,454.12, 5,180.66 and 989.10

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Solution

The fourth proportional to 3,454.12, 5,180.66 and 989.10 is: 1,483.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,454.12 : 5,180.66 = 989.10 : x
  2. Step 2: Convert to fraction form
    3,454.12/5,180.66 = 989.10/x
  3. Step 3: Cross multiply
    3,454.12x = 5,180.66 × 989.10
  4. Step 4: Simplify right side
    3,454.12x = 5,124,190.81
  5. Step 5: Solve for x
    x = 5,124,190.81/3,454.12
  6. Step 6: Final answer
    x = 1,483.50

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Double scale
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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.