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Finding the Fourth Proportional to 1,340.64, 2,011.20 and 366.84

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Solution

The fourth proportional to 1,340.64, 2,011.20 and 366.84 is: 550.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.64 : 2,011.20 = 366.84 : x
  2. Step 2: Convert to fraction form
    1,340.64/2,011.20 = 366.84/x
  3. Step 3: Cross multiply
    1,340.64x = 2,011.20 × 366.84
  4. Step 4: Simplify right side
    1,340.64x = 737,788.61
  5. Step 5: Solve for x
    x = 737,788.61/1,340.64
  6. Step 6: Final answer
    x = 550.33

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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.