Home / 1,415.11-2,121.15-537.20

Finding the Fourth Proportional to 1,415.11, 2,121.15 and 537.20

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Solution

The fourth proportional to 1,415.11, 2,121.15 and 537.20 is: 805.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.11 : 2,121.15 = 537.20 : x
  2. Step 2: Convert to fraction form
    1,415.11/2,121.15 = 537.20/x
  3. Step 3: Cross multiply
    1,415.11x = 2,121.15 × 537.20
  4. Step 4: Simplify right side
    1,415.11x = 1,139,481.78
  5. Step 5: Solve for x
    x = 1,139,481.78/1,415.11
  6. Step 6: Final answer
    x = 805.22

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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.