Home / 1,408.45-2,111.97-434.43

Finding the Fourth Proportional to 1,408.45, 2,111.97 and 434.43

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Solution

The fourth proportional to 1,408.45, 2,111.97 and 434.43 is: 651.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.45 : 2,111.97 = 434.43 : x
  2. Step 2: Convert to fraction form
    1,408.45/2,111.97 = 434.43/x
  3. Step 3: Cross multiply
    1,408.45x = 2,111.97 × 434.43
  4. Step 4: Simplify right side
    1,408.45x = 917,503.13
  5. Step 5: Solve for x
    x = 917,503.13/1,408.45
  6. Step 6: Final answer
    x = 651.43

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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.