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Finding the Fourth Proportional to 833.80, 1,249.74 and 400.84

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Solution

The fourth proportional to 833.80, 1,249.74 and 400.84 is: 600.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.80 : 1,249.74 = 400.84 : x
  2. Step 2: Convert to fraction form
    833.80/1,249.74 = 400.84/x
  3. Step 3: Cross multiply
    833.80x = 1,249.74 × 400.84
  4. Step 4: Simplify right side
    833.80x = 500,945.78
  5. Step 5: Solve for x
    x = 500,945.78/833.80
  6. Step 6: Final answer
    x = 600.80

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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.