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Finding the Fourth Proportional to 908.24, 1,361.43 and 352.81

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Solution

The fourth proportional to 908.24, 1,361.43 and 352.81 is: 528.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.24 : 1,361.43 = 352.81 : x
  2. Step 2: Convert to fraction form
    908.24/1,361.43 = 352.81/x
  3. Step 3: Cross multiply
    908.24x = 1,361.43 × 352.81
  4. Step 4: Simplify right side
    908.24x = 480,322.71
  5. Step 5: Solve for x
    x = 480,322.71/908.24
  6. Step 6: Final answer
    x = 528.85

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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.