Home / 1,408.30-2,112.14-530.90

Finding the Fourth Proportional to 1,408.30, 2,112.14 and 530.90

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Solution

The fourth proportional to 1,408.30, 2,112.14 and 530.90 is: 796.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.30 : 2,112.14 = 530.90 : x
  2. Step 2: Convert to fraction form
    1,408.30/2,112.14 = 530.90/x
  3. Step 3: Cross multiply
    1,408.30x = 2,112.14 × 530.90
  4. Step 4: Simplify right side
    1,408.30x = 1,121,321.91
  5. Step 5: Solve for x
    x = 1,121,321.91/1,408.30
  6. Step 6: Final answer
    x = 796.22

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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.