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Finding the Fourth Proportional to 505.98, 697.86 and 331.02

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Solution

The fourth proportional to 505.98, 697.86 and 331.02 is: 456.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.98 : 697.86 = 331.02 : x
  2. Step 2: Convert to fraction form
    505.98/697.86 = 331.02/x
  3. Step 3: Cross multiply
    505.98x = 697.86 × 331.02
  4. Step 4: Simplify right side
    505.98x = 231,005.62
  5. Step 5: Solve for x
    x = 231,005.62/505.98
  6. Step 6: Final answer
    x = 456.55

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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.