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Finding the Fourth Proportional to 497.18, 745.79 and 279.20

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Solution

The fourth proportional to 497.18, 745.79 and 279.20 is: 418.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.18 : 745.79 = 279.20 : x
  2. Step 2: Convert to fraction form
    497.18/745.79 = 279.20/x
  3. Step 3: Cross multiply
    497.18x = 745.79 × 279.20
  4. Step 4: Simplify right side
    497.18x = 208,225.04
  5. Step 5: Solve for x
    x = 208,225.04/497.18
  6. Step 6: Final answer
    x = 418.81

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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.