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Finding the Fourth Proportional to 1,336.29, 2,003.93 and 642.77

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Solution

The fourth proportional to 1,336.29, 2,003.93 and 642.77 is: 963.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.29 : 2,003.93 = 642.77 : x
  2. Step 2: Convert to fraction form
    1,336.29/2,003.93 = 642.77/x
  3. Step 3: Cross multiply
    1,336.29x = 2,003.93 × 642.77
  4. Step 4: Simplify right side
    1,336.29x = 1,288,052.85
  5. Step 5: Solve for x
    x = 1,288,052.85/1,336.29
  6. Step 6: Final answer
    x = 963.90

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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.