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Finding the Fourth Proportional to 2,280, 3,145.12 and 1,581.12

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Solution

The fourth proportional to 2,280, 3,145.12 and 1,581.12 is: 2,181.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280 : 3,145.12 = 1,581.12 : x
  2. Step 2: Convert to fraction form
    2,280/3,145.12 = 1,581.12/x
  3. Step 3: Cross multiply
    2,280x = 3,145.12 × 1,581.12
  4. Step 4: Simplify right side
    2,280x = 4,972,812.13
  5. Step 5: Solve for x
    x = 4,972,812.13/2,280
  6. Step 6: Final answer
    x = 2,181.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.