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Finding the Fourth Proportional to 1,003.85, 1,385.58 and 584.13

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Solution

The fourth proportional to 1,003.85, 1,385.58 and 584.13 is: 806.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.85 : 1,385.58 = 584.13 : x
  2. Step 2: Convert to fraction form
    1,003.85/1,385.58 = 584.13/x
  3. Step 3: Cross multiply
    1,003.85x = 1,385.58 × 584.13
  4. Step 4: Simplify right side
    1,003.85x = 809,358.85
  5. Step 5: Solve for x
    x = 809,358.85/1,003.85
  6. Step 6: Final answer
    x = 806.26

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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.