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Finding the Fourth Proportional to 2,807.68, 4,215.17 and 2,158.87

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Solution

The fourth proportional to 2,807.68, 4,215.17 and 2,158.87 is: 3,241.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.68 : 4,215.17 = 2,158.87 : x
  2. Step 2: Convert to fraction form
    2,807.68/4,215.17 = 2,158.87/x
  3. Step 3: Cross multiply
    2,807.68x = 4,215.17 × 2,158.87
  4. Step 4: Simplify right side
    2,807.68x = 9,100,004.06
  5. Step 5: Solve for x
    x = 9,100,004.06/2,807.68
  6. Step 6: Final answer
    x = 3,241.11

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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.