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Finding the Fourth Proportional to 2,516.54, 3,774.80 and 761.54

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Solution

The fourth proportional to 2,516.54, 3,774.80 and 761.54 is: 1,142.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,516.54 : 3,774.80 = 761.54 : x
  2. Step 2: Convert to fraction form
    2,516.54/3,774.80 = 761.54/x
  3. Step 3: Cross multiply
    2,516.54x = 3,774.80 × 761.54
  4. Step 4: Simplify right side
    2,516.54x = 2,874,661.19
  5. Step 5: Solve for x
    x = 2,874,661.19/2,516.54
  6. Step 6: Final answer
    x = 1,142.31

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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.