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Finding the Fourth Proportional to 330.94, 496.40 and 87.46

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Solution

The fourth proportional to 330.94, 496.40 and 87.46 is: 131.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.94 : 496.40 = 87.46 : x
  2. Step 2: Convert to fraction form
    330.94/496.40 = 87.46/x
  3. Step 3: Cross multiply
    330.94x = 496.40 × 87.46
  4. Step 4: Simplify right side
    330.94x = 43,415.14
  5. Step 5: Solve for x
    x = 43,415.14/330.94
  6. Step 6: Final answer
    x = 131.19

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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.