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Finding the Fourth Proportional to 263.31, 395.02 and 87.63

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Solution

The fourth proportional to 263.31, 395.02 and 87.63 is: 131.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.31 : 395.02 = 87.63 : x
  2. Step 2: Convert to fraction form
    263.31/395.02 = 87.63/x
  3. Step 3: Cross multiply
    263.31x = 395.02 × 87.63
  4. Step 4: Simplify right side
    263.31x = 34,615.60
  5. Step 5: Solve for x
    x = 34,615.60/263.31
  6. Step 6: Final answer
    x = 131.46

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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.