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Finding the Fourth Proportional to 4,487.78, 6,721.94 and 2,840.24

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Solution

The fourth proportional to 4,487.78, 6,721.94 and 2,840.24 is: 4,254.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,487.78 : 6,721.94 = 2,840.24 : x
  2. Step 2: Convert to fraction form
    4,487.78/6,721.94 = 2,840.24/x
  3. Step 3: Cross multiply
    4,487.78x = 6,721.94 × 2,840.24
  4. Step 4: Simplify right side
    4,487.78x = 19,091,922.87
  5. Step 5: Solve for x
    x = 19,091,922.87/4,487.78
  6. Step 6: Final answer
    x = 4,254.20

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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.