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Finding the Fourth Proportional to 1,586.56, 2,188.56 and 1,120

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Solution

The fourth proportional to 1,586.56, 2,188.56 and 1,120 is: 1,544.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.56 : 2,188.56 = 1,120 : x
  2. Step 2: Convert to fraction form
    1,586.56/2,188.56 = 1,120/x
  3. Step 3: Cross multiply
    1,586.56x = 2,188.56 × 1,120
  4. Step 4: Simplify right side
    1,586.56x = 2,451,187.20
  5. Step 5: Solve for x
    x = 2,451,187.20/1,586.56
  6. Step 6: Final answer
    x = 1,544.97

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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.