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Finding the Fourth Proportional to 1,027.90, 1,419.03 and 635.14

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Solution

The fourth proportional to 1,027.90, 1,419.03 and 635.14 is: 876.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.90 : 1,419.03 = 635.14 : x
  2. Step 2: Convert to fraction form
    1,027.90/1,419.03 = 635.14/x
  3. Step 3: Cross multiply
    1,027.90x = 1,419.03 × 635.14
  4. Step 4: Simplify right side
    1,027.90x = 901,282.71
  5. Step 5: Solve for x
    x = 901,282.71/1,027.90
  6. Step 6: Final answer
    x = 876.82

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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.