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Finding the Fourth Proportional to 444.65, 665.75 and 290.21

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Solution

The fourth proportional to 444.65, 665.75 and 290.21 is: 434.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.65 : 665.75 = 290.21 : x
  2. Step 2: Convert to fraction form
    444.65/665.75 = 290.21/x
  3. Step 3: Cross multiply
    444.65x = 665.75 × 290.21
  4. Step 4: Simplify right side
    444.65x = 193,204.70
  5. Step 5: Solve for x
    x = 193,204.70/444.65
  6. Step 6: Final answer
    x = 434.51

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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.