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Finding the Fourth Proportional to 901.23, 1,351.94 and 285.12

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Solution

The fourth proportional to 901.23, 1,351.94 and 285.12 is: 427.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.23 : 1,351.94 = 285.12 : x
  2. Step 2: Convert to fraction form
    901.23/1,351.94 = 285.12/x
  3. Step 3: Cross multiply
    901.23x = 1,351.94 × 285.12
  4. Step 4: Simplify right side
    901.23x = 385,465.31
  5. Step 5: Solve for x
    x = 385,465.31/901.23
  6. Step 6: Final answer
    x = 427.71

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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.