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Finding the Fourth Proportional to 901.20, 1,351.86 and 316.13

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Solution

The fourth proportional to 901.20, 1,351.86 and 316.13 is: 474.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.20 : 1,351.86 = 316.13 : x
  2. Step 2: Convert to fraction form
    901.20/1,351.86 = 316.13/x
  3. Step 3: Cross multiply
    901.20x = 1,351.86 × 316.13
  4. Step 4: Simplify right side
    901.20x = 427,361.92
  5. Step 5: Solve for x
    x = 427,361.92/901.20
  6. Step 6: Final answer
    x = 474.22

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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.