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Finding the Fourth Proportional to 1,222.66, 1,833.78 and 400.92

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Solution

The fourth proportional to 1,222.66, 1,833.78 and 400.92 is: 601.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.66 : 1,833.78 = 400.92 : x
  2. Step 2: Convert to fraction form
    1,222.66/1,833.78 = 400.92/x
  3. Step 3: Cross multiply
    1,222.66x = 1,833.78 × 400.92
  4. Step 4: Simplify right side
    1,222.66x = 735,199.08
  5. Step 5: Solve for x
    x = 735,199.08/1,222.66
  6. Step 6: Final answer
    x = 601.31

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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.