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Finding the Fourth Proportional to 497.21, 745.80 and 208.65

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Solution

The fourth proportional to 497.21, 745.80 and 208.65 is: 312.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.21 : 745.80 = 208.65 : x
  2. Step 2: Convert to fraction form
    497.21/745.80 = 208.65/x
  3. Step 3: Cross multiply
    497.21x = 745.80 × 208.65
  4. Step 4: Simplify right side
    497.21x = 155,611.17
  5. Step 5: Solve for x
    x = 155,611.17/497.21
  6. Step 6: Final answer
    x = 312.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.