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Finding the Fourth Proportional to 501.60, 691.92 and 361.56

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Solution

The fourth proportional to 501.60, 691.92 and 361.56 is: 498.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.60 : 691.92 = 361.56 : x
  2. Step 2: Convert to fraction form
    501.60/691.92 = 361.56/x
  3. Step 3: Cross multiply
    501.60x = 691.92 × 361.56
  4. Step 4: Simplify right side
    501.60x = 250,170.60
  5. Step 5: Solve for x
    x = 250,170.60/501.60
  6. Step 6: Final answer
    x = 498.75

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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.