Home / 1,415.18-2,121.14-548.76

Finding the Fourth Proportional to 1,415.18, 2,121.14 and 548.76

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Solution

The fourth proportional to 1,415.18, 2,121.14 and 548.76 is: 822.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.18 : 2,121.14 = 548.76 : x
  2. Step 2: Convert to fraction form
    1,415.18/2,121.14 = 548.76/x
  3. Step 3: Cross multiply
    1,415.18x = 2,121.14 × 548.76
  4. Step 4: Simplify right side
    1,415.18x = 1,163,996.79
  5. Step 5: Solve for x
    x = 1,163,996.79/1,415.18
  6. Step 6: Final answer
    x = 822.51

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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.