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Finding the Fourth Proportional to 1,580.75, 2,179.74 and 1,108.50

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Solution

The fourth proportional to 1,580.75, 2,179.74 and 1,108.50 is: 1,528.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.75 : 2,179.74 = 1,108.50 : x
  2. Step 2: Convert to fraction form
    1,580.75/2,179.74 = 1,108.50/x
  3. Step 3: Cross multiply
    1,580.75x = 2,179.74 × 1,108.50
  4. Step 4: Simplify right side
    1,580.75x = 2,416,241.79
  5. Step 5: Solve for x
    x = 2,416,241.79/1,580.75
  6. Step 6: Final answer
    x = 1,528.54

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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.