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Finding the Fourth Proportional to 465.10, 641.80 and 268.60

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Solution

The fourth proportional to 465.10, 641.80 and 268.60 is: 370.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.10 : 641.80 = 268.60 : x
  2. Step 2: Convert to fraction form
    465.10/641.80 = 268.60/x
  3. Step 3: Cross multiply
    465.10x = 641.80 × 268.60
  4. Step 4: Simplify right side
    465.10x = 172,387.48
  5. Step 5: Solve for x
    x = 172,387.48/465.10
  6. Step 6: Final answer
    x = 370.65

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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.