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Finding the Fourth Proportional to 355.03, 489.76 and 248.65

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Solution

The fourth proportional to 355.03, 489.76 and 248.65 is: 343.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.03 : 489.76 = 248.65 : x
  2. Step 2: Convert to fraction form
    355.03/489.76 = 248.65/x
  3. Step 3: Cross multiply
    355.03x = 489.76 × 248.65
  4. Step 4: Simplify right side
    355.03x = 121,776.98
  5. Step 5: Solve for x
    x = 121,776.98/355.03
  6. Step 6: Final answer
    x = 343.01

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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.