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Finding the Fourth Proportional to 334.28, 501.42 and 90.81

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Solution

The fourth proportional to 334.28, 501.42 and 90.81 is: 136.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.28 : 501.42 = 90.81 : x
  2. Step 2: Convert to fraction form
    334.28/501.42 = 90.81/x
  3. Step 3: Cross multiply
    334.28x = 501.42 × 90.81
  4. Step 4: Simplify right side
    334.28x = 45,533.95
  5. Step 5: Solve for x
    x = 45,533.95/334.28
  6. Step 6: Final answer
    x = 136.22

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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.