Home / 1,408.29-2,112.44-434.26

Finding the Fourth Proportional to 1,408.29, 2,112.44 and 434.26

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Solution

The fourth proportional to 1,408.29, 2,112.44 and 434.26 is: 651.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.29 : 2,112.44 = 434.26 : x
  2. Step 2: Convert to fraction form
    1,408.29/2,112.44 = 434.26/x
  3. Step 3: Cross multiply
    1,408.29x = 2,112.44 × 434.26
  4. Step 4: Simplify right side
    1,408.29x = 917,348.19
  5. Step 5: Solve for x
    x = 917,348.19/1,408.29
  6. Step 6: Final answer
    x = 651.39

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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.