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Finding the Fourth Proportional to 1,222.21, 1,833.32 and 356.59

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Solution

The fourth proportional to 1,222.21, 1,833.32 and 356.59 is: 534.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.21 : 1,833.32 = 356.59 : x
  2. Step 2: Convert to fraction form
    1,222.21/1,833.32 = 356.59/x
  3. Step 3: Cross multiply
    1,222.21x = 1,833.32 × 356.59
  4. Step 4: Simplify right side
    1,222.21x = 653,743.58
  5. Step 5: Solve for x
    x = 653,743.58/1,222.21
  6. Step 6: Final answer
    x = 534.89

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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.