Home / 2,120.10-3,180.15-560.10

Finding the Fourth Proportional to 2,120.10, 3,180.15 and 560.10

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Solution

The fourth proportional to 2,120.10, 3,180.15 and 560.10 is: 840.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.10 : 3,180.15 = 560.10 : x
  2. Step 2: Convert to fraction form
    2,120.10/3,180.15 = 560.10/x
  3. Step 3: Cross multiply
    2,120.10x = 3,180.15 × 560.10
  4. Step 4: Simplify right side
    2,120.10x = 1,781,202.02
  5. Step 5: Solve for x
    x = 1,781,202.02/2,120.10
  6. Step 6: Final answer
    x = 840.15

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,121.10, 3,181.65 and 561.10
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.