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Finding the Fourth Proportional to 1,027.60, 1,418.15 and 634.54

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Solution

The fourth proportional to 1,027.60, 1,418.15 and 634.54 is: 875.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.60 : 1,418.15 = 634.54 : x
  2. Step 2: Convert to fraction form
    1,027.60/1,418.15 = 634.54/x
  3. Step 3: Cross multiply
    1,027.60x = 1,418.15 × 634.54
  4. Step 4: Simplify right side
    1,027.60x = 899,872.90
  5. Step 5: Solve for x
    x = 899,872.90/1,027.60
  6. Step 6: Final answer
    x = 875.70

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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.