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Finding the Fourth Proportional to 505.52, 697.92 and 331.16

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Solution

The fourth proportional to 505.52, 697.92 and 331.16 is: 457.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.52 : 697.92 = 331.16 : x
  2. Step 2: Convert to fraction form
    505.52/697.92 = 331.16/x
  3. Step 3: Cross multiply
    505.52x = 697.92 × 331.16
  4. Step 4: Simplify right side
    505.52x = 231,123.19
  5. Step 5: Solve for x
    x = 231,123.19/505.52
  6. Step 6: Final answer
    x = 457.20

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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.