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Finding the Fourth Proportional to 465.10, 696.72 and 220.90

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Solution

The fourth proportional to 465.10, 696.72 and 220.90 is: 330.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.10 : 696.72 = 220.90 : x
  2. Step 2: Convert to fraction form
    465.10/696.72 = 220.90/x
  3. Step 3: Cross multiply
    465.10x = 696.72 × 220.90
  4. Step 4: Simplify right side
    465.10x = 153,905.45
  5. Step 5: Solve for x
    x = 153,905.45/465.10
  6. Step 6: Final answer
    x = 330.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.