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Finding the Fourth Proportional to 500.21, 691.25 and 360.79

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Solution

The fourth proportional to 500.21, 691.25 and 360.79 is: 498.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.21 : 691.25 = 360.79 : x
  2. Step 2: Convert to fraction form
    500.21/691.25 = 360.79/x
  3. Step 3: Cross multiply
    500.21x = 691.25 × 360.79
  4. Step 4: Simplify right side
    500.21x = 249,396.09
  5. Step 5: Solve for x
    x = 249,396.09/500.21
  6. Step 6: Final answer
    x = 498.58

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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.