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Finding the Fourth Proportional to 1,635.63, 2,257.88 and 1,138.08

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Solution

The fourth proportional to 1,635.63, 2,257.88 and 1,138.08 is: 1,571.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.63 : 2,257.88 = 1,138.08 : x
  2. Step 2: Convert to fraction form
    1,635.63/2,257.88 = 1,138.08/x
  3. Step 3: Cross multiply
    1,635.63x = 2,257.88 × 1,138.08
  4. Step 4: Simplify right side
    1,635.63x = 2,569,650.85
  5. Step 5: Solve for x
    x = 2,569,650.85/1,635.63
  6. Step 6: Final answer
    x = 1,571.05

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1.5x scale

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.