Home / 1,210.38-1,815.57-480.12

Finding the Fourth Proportional to 1,210.38, 1,815.57 and 480.12

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Solution

The fourth proportional to 1,210.38, 1,815.57 and 480.12 is: 720.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.38 : 1,815.57 = 480.12 : x
  2. Step 2: Convert to fraction form
    1,210.38/1,815.57 = 480.12/x
  3. Step 3: Cross multiply
    1,210.38x = 1,815.57 × 480.12
  4. Step 4: Simplify right side
    1,210.38x = 871,691.47
  5. Step 5: Solve for x
    x = 871,691.47/1,210.38
  6. Step 6: Final answer
    x = 720.18

Related Problems

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Half scale
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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.