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Finding the Fourth Proportional to 464.50, 641.02 and 257.50

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Solution

The fourth proportional to 464.50, 641.02 and 257.50 is: 355.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.50 : 641.02 = 257.50 : x
  2. Step 2: Convert to fraction form
    464.50/641.02 = 257.50/x
  3. Step 3: Cross multiply
    464.50x = 641.02 × 257.50
  4. Step 4: Simplify right side
    464.50x = 165,062.65
  5. Step 5: Solve for x
    x = 165,062.65/464.50
  6. Step 6: Final answer
    x = 355.36

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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.