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Finding the Fourth Proportional to 501.11, 691.70 and 361.31

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Solution

The fourth proportional to 501.11, 691.70 and 361.31 is: 498.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.11 : 691.70 = 361.31 : x
  2. Step 2: Convert to fraction form
    501.11/691.70 = 361.31/x
  3. Step 3: Cross multiply
    501.11x = 691.70 × 361.31
  4. Step 4: Simplify right side
    501.11x = 249,915.57
  5. Step 5: Solve for x
    x = 249,915.57/501.11
  6. Step 6: Final answer
    x = 498.73

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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.