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Finding the Fourth Proportional to 467.94, 645.80 and 290.86

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Solution

The fourth proportional to 467.94, 645.80 and 290.86 is: 401.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.94 : 645.80 = 290.86 : x
  2. Step 2: Convert to fraction form
    467.94/645.80 = 290.86/x
  3. Step 3: Cross multiply
    467.94x = 645.80 × 290.86
  4. Step 4: Simplify right side
    467.94x = 187,837.39
  5. Step 5: Solve for x
    x = 187,837.39/467.94
  6. Step 6: Final answer
    x = 401.41

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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.