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Finding the Fourth Proportional to 499.59, 687.15 and 401.13

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Solution

The fourth proportional to 499.59, 687.15 and 401.13 is: 551.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.59 : 687.15 = 401.13 : x
  2. Step 2: Convert to fraction form
    499.59/687.15 = 401.13/x
  3. Step 3: Cross multiply
    499.59x = 687.15 × 401.13
  4. Step 4: Simplify right side
    499.59x = 275,636.48
  5. Step 5: Solve for x
    x = 275,636.48/499.59
  6. Step 6: Final answer
    x = 551.73

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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.