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Finding the Fourth Proportional to 5,520.78, 8,281.20 and 2,058

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Solution

The fourth proportional to 5,520.78, 8,281.20 and 2,058 is: 3,087.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,520.78 : 8,281.20 = 2,058 : x
  2. Step 2: Convert to fraction form
    5,520.78/8,281.20 = 2,058/x
  3. Step 3: Cross multiply
    5,520.78x = 8,281.20 × 2,058
  4. Step 4: Simplify right side
    5,520.78x = 17,042,709.60
  5. Step 5: Solve for x
    x = 17,042,709.60/5,520.78
  6. Step 6: Final answer
    x = 3,087.01

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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.