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Finding the Fourth Proportional to 446.45, 668.84 and 260.91

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Solution

The fourth proportional to 446.45, 668.84 and 260.91 is: 390.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.45 : 668.84 = 260.91 : x
  2. Step 2: Convert to fraction form
    446.45/668.84 = 260.91/x
  3. Step 3: Cross multiply
    446.45x = 668.84 × 260.91
  4. Step 4: Simplify right side
    446.45x = 174,505.74
  5. Step 5: Solve for x
    x = 174,505.74/446.45
  6. Step 6: Final answer
    x = 390.88

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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.