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Finding the Fourth Proportional to 287.22, 428.87 and 232.55

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Solution

The fourth proportional to 287.22, 428.87 and 232.55 is: 347.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.22 : 428.87 = 232.55 : x
  2. Step 2: Convert to fraction form
    287.22/428.87 = 232.55/x
  3. Step 3: Cross multiply
    287.22x = 428.87 × 232.55
  4. Step 4: Simplify right side
    287.22x = 99,733.72
  5. Step 5: Solve for x
    x = 99,733.72/287.22
  6. Step 6: Final answer
    x = 347.24

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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.