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Finding the Fourth Proportional to 2,679.36, 4,018.08 and 1,140

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Solution

The fourth proportional to 2,679.36, 4,018.08 and 1,140 is: 1,709.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.36 : 4,018.08 = 1,140 : x
  2. Step 2: Convert to fraction form
    2,679.36/4,018.08 = 1,140/x
  3. Step 3: Cross multiply
    2,679.36x = 4,018.08 × 1,140
  4. Step 4: Simplify right side
    2,679.36x = 4,580,611.20
  5. Step 5: Solve for x
    x = 4,580,611.20/2,679.36
  6. Step 6: Final answer
    x = 1,709.59

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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.