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Finding the Fourth Proportional to 2,715, 4,072.54 and 663

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Solution

The fourth proportional to 2,715, 4,072.54 and 663 is: 994.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,715 : 4,072.54 = 663 : x
  2. Step 2: Convert to fraction form
    2,715/4,072.54 = 663/x
  3. Step 3: Cross multiply
    2,715x = 4,072.54 × 663
  4. Step 4: Simplify right side
    2,715x = 2,700,094.02
  5. Step 5: Solve for x
    x = 2,700,094.02/2,715
  6. Step 6: Final answer
    x = 994.51

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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.