Home / 1,218.05-1,827.18-340.55

Finding the Fourth Proportional to 1,218.05, 1,827.18 and 340.55

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Solution

The fourth proportional to 1,218.05, 1,827.18 and 340.55 is: 510.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.05 : 1,827.18 = 340.55 : x
  2. Step 2: Convert to fraction form
    1,218.05/1,827.18 = 340.55/x
  3. Step 3: Cross multiply
    1,218.05x = 1,827.18 × 340.55
  4. Step 4: Simplify right side
    1,218.05x = 622,237.01
  5. Step 5: Solve for x
    x = 622,237.01/1,218.05
  6. Step 6: Final answer
    x = 510.85

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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.