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Finding the Fourth Proportional to 467.42, 645.07 and 257.63

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Solution

The fourth proportional to 467.42, 645.07 and 257.63 is: 355.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.42 : 645.07 = 257.63 : x
  2. Step 2: Convert to fraction form
    467.42/645.07 = 257.63/x
  3. Step 3: Cross multiply
    467.42x = 645.07 × 257.63
  4. Step 4: Simplify right side
    467.42x = 166,189.38
  5. Step 5: Solve for x
    x = 166,189.38/467.42
  6. Step 6: Final answer
    x = 355.55

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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.