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Finding the Fourth Proportional to 2,754, 4,132.62 and 1,215

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Solution

The fourth proportional to 2,754, 4,132.62 and 1,215 is: 1,823.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,754 : 4,132.62 = 1,215 : x
  2. Step 2: Convert to fraction form
    2,754/4,132.62 = 1,215/x
  3. Step 3: Cross multiply
    2,754x = 4,132.62 × 1,215
  4. Step 4: Simplify right side
    2,754x = 5,021,133.30
  5. Step 5: Solve for x
    x = 5,021,133.30/2,754
  6. Step 6: Final answer
    x = 1,823.21

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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.