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Finding the Fourth Proportional to 2,614.02, 3,920.97 and 666.21

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Solution

The fourth proportional to 2,614.02, 3,920.97 and 666.21 is: 999.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,614.02 : 3,920.97 = 666.21 : x
  2. Step 2: Convert to fraction form
    2,614.02/3,920.97 = 666.21/x
  3. Step 3: Cross multiply
    2,614.02x = 3,920.97 × 666.21
  4. Step 4: Simplify right side
    2,614.02x = 2,612,189.42
  5. Step 5: Solve for x
    x = 2,612,189.42/2,614.02
  6. Step 6: Final answer
    x = 999.30

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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.