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Finding the Fourth Proportional to 1,408.97, 2,112.98 and 575.82

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Solution

The fourth proportional to 1,408.97, 2,112.98 and 575.82 is: 863.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.97 : 2,112.98 = 575.82 : x
  2. Step 2: Convert to fraction form
    1,408.97/2,112.98 = 575.82/x
  3. Step 3: Cross multiply
    1,408.97x = 2,112.98 × 575.82
  4. Step 4: Simplify right side
    1,408.97x = 1,216,693.26
  5. Step 5: Solve for x
    x = 1,216,693.26/1,408.97
  6. Step 6: Final answer
    x = 863.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.