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Finding the Fourth Proportional to 229.56, 314.88 and 215.58

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Solution

The fourth proportional to 229.56, 314.88 and 215.58 is: 295.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.56 : 314.88 = 215.58 : x
  2. Step 2: Convert to fraction form
    229.56/314.88 = 215.58/x
  3. Step 3: Cross multiply
    229.56x = 314.88 × 215.58
  4. Step 4: Simplify right side
    229.56x = 67,881.83
  5. Step 5: Solve for x
    x = 67,881.83/229.56
  6. Step 6: Final answer
    x = 295.70

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.