Home / 1,218.35-1,827.13-396.45

Finding the Fourth Proportional to 1,218.35, 1,827.13 and 396.45

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Solution

The fourth proportional to 1,218.35, 1,827.13 and 396.45 is: 594.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.35 : 1,827.13 = 396.45 : x
  2. Step 2: Convert to fraction form
    1,218.35/1,827.13 = 396.45/x
  3. Step 3: Cross multiply
    1,218.35x = 1,827.13 × 396.45
  4. Step 4: Simplify right side
    1,218.35x = 724,365.69
  5. Step 5: Solve for x
    x = 724,365.69/1,218.35
  6. Step 6: Final answer
    x = 594.55

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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.