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Finding the Fourth Proportional to 314.66, 434.02 and 221.34

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Solution

The fourth proportional to 314.66, 434.02 and 221.34 is: 305.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.66 : 434.02 = 221.34 : x
  2. Step 2: Convert to fraction form
    314.66/434.02 = 221.34/x
  3. Step 3: Cross multiply
    314.66x = 434.02 × 221.34
  4. Step 4: Simplify right side
    314.66x = 96,062.71
  5. Step 5: Solve for x
    x = 96,062.71/314.66
  6. Step 6: Final answer
    x = 305.29

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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.