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Finding the Fourth Proportional to 235.31, 350.53 and 220.35

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Solution

The fourth proportional to 235.31, 350.53 and 220.35 is: 328.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.31 : 350.53 = 220.35 : x
  2. Step 2: Convert to fraction form
    235.31/350.53 = 220.35/x
  3. Step 3: Cross multiply
    235.31x = 350.53 × 220.35
  4. Step 4: Simplify right side
    235.31x = 77,240.05
  5. Step 5: Solve for x
    x = 77,240.05/235.31
  6. Step 6: Final answer
    x = 328.26

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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.