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Finding the Fourth Proportional to 229.79, 316.74 and 210.95

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Solution

The fourth proportional to 229.79, 316.74 and 210.95 is: 290.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.79 : 316.74 = 210.95 : x
  2. Step 2: Convert to fraction form
    229.79/316.74 = 210.95/x
  3. Step 3: Cross multiply
    229.79x = 316.74 × 210.95
  4. Step 4: Simplify right side
    229.79x = 66,816.30
  5. Step 5: Solve for x
    x = 66,816.30/229.79
  6. Step 6: Final answer
    x = 290.77

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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.