Home / 3,547.40-5,321.10-1,992.20

Finding the Fourth Proportional to 3,547.40, 5,321.10 and 1,992.20

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Solution

The fourth proportional to 3,547.40, 5,321.10 and 1,992.20 is: 2,988.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,547.40 : 5,321.10 = 1,992.20 : x
  2. Step 2: Convert to fraction form
    3,547.40/5,321.10 = 1,992.20/x
  3. Step 3: Cross multiply
    3,547.40x = 5,321.10 × 1,992.20
  4. Step 4: Simplify right side
    3,547.40x = 10,600,695.42
  5. Step 5: Solve for x
    x = 10,600,695.42/3,547.40
  6. Step 6: Final answer
    x = 2,988.30

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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.