Home / 1,415.11-2,121.85-548.41

Finding the Fourth Proportional to 1,415.11, 2,121.85 and 548.41

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Solution

The fourth proportional to 1,415.11, 2,121.85 and 548.41 is: 822.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.11 : 2,121.85 = 548.41 : x
  2. Step 2: Convert to fraction form
    1,415.11/2,121.85 = 548.41/x
  3. Step 3: Cross multiply
    1,415.11x = 2,121.85 × 548.41
  4. Step 4: Simplify right side
    1,415.11x = 1,163,639.14
  5. Step 5: Solve for x
    x = 1,163,639.14/1,415.11
  6. Step 6: Final answer
    x = 822.30

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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.