Home / 1,218.91-1,827.88-438.66

Finding the Fourth Proportional to 1,218.91, 1,827.88 and 438.66

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Solution

The fourth proportional to 1,218.91, 1,827.88 and 438.66 is: 657.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.91 : 1,827.88 = 438.66 : x
  2. Step 2: Convert to fraction form
    1,218.91/1,827.88 = 438.66/x
  3. Step 3: Cross multiply
    1,218.91x = 1,827.88 × 438.66
  4. Step 4: Simplify right side
    1,218.91x = 801,817.84
  5. Step 5: Solve for x
    x = 801,817.84/1,218.91
  6. Step 6: Final answer
    x = 657.82

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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.