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Finding the Fourth Proportional to 1,408.85, 2,112.93 and 587.13

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Solution

The fourth proportional to 1,408.85, 2,112.93 and 587.13 is: 880.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.85 : 2,112.93 = 587.13 : x
  2. Step 2: Convert to fraction form
    1,408.85/2,112.93 = 587.13/x
  3. Step 3: Cross multiply
    1,408.85x = 2,112.93 × 587.13
  4. Step 4: Simplify right side
    1,408.85x = 1,240,564.59
  5. Step 5: Solve for x
    x = 1,240,564.59/1,408.85
  6. Step 6: Final answer
    x = 880.55

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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.