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Finding the Fourth Proportional to 229.82, 317.46 and 156.45

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Solution

The fourth proportional to 229.82, 317.46 and 156.45 is: 216.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.82 : 317.46 = 156.45 : x
  2. Step 2: Convert to fraction form
    229.82/317.46 = 156.45/x
  3. Step 3: Cross multiply
    229.82x = 317.46 × 156.45
  4. Step 4: Simplify right side
    229.82x = 49,666.62
  5. Step 5: Solve for x
    x = 49,666.62/229.82
  6. Step 6: Final answer
    x = 216.12

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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.