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Finding the Fourth Proportional to 2,715.24, 4,072.86 and 663.24

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Solution

The fourth proportional to 2,715.24, 4,072.86 and 663.24 is: 994.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,715.24 : 4,072.86 = 663.24 : x
  2. Step 2: Convert to fraction form
    2,715.24/4,072.86 = 663.24/x
  3. Step 3: Cross multiply
    2,715.24x = 4,072.86 × 663.24
  4. Step 4: Simplify right side
    2,715.24x = 2,701,283.67
  5. Step 5: Solve for x
    x = 2,701,283.67/2,715.24
  6. Step 6: Final answer
    x = 994.86

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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.