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Finding the Fourth Proportional to 2,188.87, 3,020.87 and 1,349.42

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Solution

The fourth proportional to 2,188.87, 3,020.87 and 1,349.42 is: 1,862.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.87 : 3,020.87 = 1,349.42 : x
  2. Step 2: Convert to fraction form
    2,188.87/3,020.87 = 1,349.42/x
  3. Step 3: Cross multiply
    2,188.87x = 3,020.87 × 1,349.42
  4. Step 4: Simplify right side
    2,188.87x = 4,076,410.66
  5. Step 5: Solve for x
    x = 4,076,410.66/2,188.87
  6. Step 6: Final answer
    x = 1,862.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.