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Finding the Fourth Proportional to 235.18, 350.77 and 220.48

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Solution

The fourth proportional to 235.18, 350.77 and 220.48 is: 328.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.18 : 350.77 = 220.48 : x
  2. Step 2: Convert to fraction form
    235.18/350.77 = 220.48/x
  3. Step 3: Cross multiply
    235.18x = 350.77 × 220.48
  4. Step 4: Simplify right side
    235.18x = 77,337.77
  5. Step 5: Solve for x
    x = 77,337.77/235.18
  6. Step 6: Final answer
    x = 328.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.