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Finding the Fourth Proportional to 493.10, 679.80 and 353.18

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Solution

The fourth proportional to 493.10, 679.80 and 353.18 is: 486.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.10 : 679.80 = 353.18 : x
  2. Step 2: Convert to fraction form
    493.10/679.80 = 353.18/x
  3. Step 3: Cross multiply
    493.10x = 679.80 × 353.18
  4. Step 4: Simplify right side
    493.10x = 240,088.37
  5. Step 5: Solve for x
    x = 240,088.37/493.10
  6. Step 6: Final answer
    x = 486.90

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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.