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Finding the Fourth Proportional to 465.08, 641.76 and 290.48

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Solution

The fourth proportional to 465.08, 641.76 and 290.48 is: 400.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.08 : 641.76 = 290.48 : x
  2. Step 2: Convert to fraction form
    465.08/641.76 = 290.48/x
  3. Step 3: Cross multiply
    465.08x = 641.76 × 290.48
  4. Step 4: Simplify right side
    465.08x = 186,418.44
  5. Step 5: Solve for x
    x = 186,418.44/465.08
  6. Step 6: Final answer
    x = 400.83

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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.