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Finding the Fourth Proportional to 357.29, 493.02 and 209.87

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Solution

The fourth proportional to 357.29, 493.02 and 209.87 is: 289.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.29 : 493.02 = 209.87 : x
  2. Step 2: Convert to fraction form
    357.29/493.02 = 209.87/x
  3. Step 3: Cross multiply
    357.29x = 493.02 × 209.87
  4. Step 4: Simplify right side
    357.29x = 103,470.11
  5. Step 5: Solve for x
    x = 103,470.11/357.29
  6. Step 6: Final answer
    x = 289.60

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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.