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Finding the Fourth Proportional to 1,872.23, 2,807.33 and 639.14

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Solution

The fourth proportional to 1,872.23, 2,807.33 and 639.14 is: 958.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.23 : 2,807.33 = 639.14 : x
  2. Step 2: Convert to fraction form
    1,872.23/2,807.33 = 639.14/x
  3. Step 3: Cross multiply
    1,872.23x = 2,807.33 × 639.14
  4. Step 4: Simplify right side
    1,872.23x = 1,794,259.66
  5. Step 5: Solve for x
    x = 1,794,259.66/1,872.23
  6. Step 6: Final answer
    x = 958.36

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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.