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Finding the Fourth Proportional to 467.72, 645.29 and 290.61

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Solution

The fourth proportional to 467.72, 645.29 and 290.61 is: 400.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.72 : 645.29 = 290.61 : x
  2. Step 2: Convert to fraction form
    467.72/645.29 = 290.61/x
  3. Step 3: Cross multiply
    467.72x = 645.29 × 290.61
  4. Step 4: Simplify right side
    467.72x = 187,528.69
  5. Step 5: Solve for x
    x = 187,528.69/467.72
  6. Step 6: Final answer
    x = 400.95

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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.