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Finding the Fourth Proportional to 497.90, 745.50 and 281.09

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Solution

The fourth proportional to 497.90, 745.50 and 281.09 is: 420.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.90 : 745.50 = 281.09 : x
  2. Step 2: Convert to fraction form
    497.90/745.50 = 281.09/x
  3. Step 3: Cross multiply
    497.90x = 745.50 × 281.09
  4. Step 4: Simplify right side
    497.90x = 209,552.60
  5. Step 5: Solve for x
    x = 209,552.60/497.90
  6. Step 6: Final answer
    x = 420.87

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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.