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Finding the Fourth Proportional to 1,004.33, 1,385.87 and 584.78

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Solution

The fourth proportional to 1,004.33, 1,385.87 and 584.78 is: 806.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.33 : 1,385.87 = 584.78 : x
  2. Step 2: Convert to fraction form
    1,004.33/1,385.87 = 584.78/x
  3. Step 3: Cross multiply
    1,004.33x = 1,385.87 × 584.78
  4. Step 4: Simplify right side
    1,004.33x = 810,419.21
  5. Step 5: Solve for x
    x = 810,419.21/1,004.33
  6. Step 6: Final answer
    x = 806.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.