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Finding the Fourth Proportional to 5,287.72, 7,932.49 and 1,778.07

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Solution

The fourth proportional to 5,287.72, 7,932.49 and 1,778.07 is: 2,667.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.72 : 7,932.49 = 1,778.07 : x
  2. Step 2: Convert to fraction form
    5,287.72/7,932.49 = 1,778.07/x
  3. Step 3: Cross multiply
    5,287.72x = 7,932.49 × 1,778.07
  4. Step 4: Simplify right side
    5,287.72x = 14,104,522.49
  5. Step 5: Solve for x
    x = 14,104,522.49/5,287.72
  6. Step 6: Final answer
    x = 2,667.41

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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.