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Finding the Fourth Proportional to 316.98, 436.86 and 229.50

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Solution

The fourth proportional to 316.98, 436.86 and 229.50 is: 316.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.98 : 436.86 = 229.50 : x
  2. Step 2: Convert to fraction form
    316.98/436.86 = 229.50/x
  3. Step 3: Cross multiply
    316.98x = 436.86 × 229.50
  4. Step 4: Simplify right side
    316.98x = 100,259.37
  5. Step 5: Solve for x
    x = 100,259.37/316.98
  6. Step 6: Final answer
    x = 316.30

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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.