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Finding the Fourth Proportional to 330.60, 455.61 and 268.65

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Solution

The fourth proportional to 330.60, 455.61 and 268.65 is: 370.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.60 : 455.61 = 268.65 : x
  2. Step 2: Convert to fraction form
    330.60/455.61 = 268.65/x
  3. Step 3: Cross multiply
    330.60x = 455.61 × 268.65
  4. Step 4: Simplify right side
    330.60x = 122,399.63
  5. Step 5: Solve for x
    x = 122,399.63/330.60
  6. Step 6: Final answer
    x = 370.23

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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.