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Finding the Fourth Proportional to 330.45, 455.81 and 260.48

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Solution

The fourth proportional to 330.45, 455.81 and 260.48 is: 359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.45 : 455.81 = 260.48 : x
  2. Step 2: Convert to fraction form
    330.45/455.81 = 260.48/x
  3. Step 3: Cross multiply
    330.45x = 455.81 × 260.48
  4. Step 4: Simplify right side
    330.45x = 118,729.23
  5. Step 5: Solve for x
    x = 118,729.23/330.45
  6. Step 6: Final answer
    x = 359.30

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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.