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Finding the Fourth Proportional to 901.35, 1,352.30 and 381.08

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Solution

The fourth proportional to 901.35, 1,352.30 and 381.08 is: 571.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.35 : 1,352.30 = 381.08 : x
  2. Step 2: Convert to fraction form
    901.35/1,352.30 = 381.08/x
  3. Step 3: Cross multiply
    901.35x = 1,352.30 × 381.08
  4. Step 4: Simplify right side
    901.35x = 515,335.96
  5. Step 5: Solve for x
    x = 515,335.96/901.35
  6. Step 6: Final answer
    x = 571.74

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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.