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Finding the Fourth Proportional to 901.47, 1,352.19 and 285.15

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Solution

The fourth proportional to 901.47, 1,352.19 and 285.15 is: 427.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.47 : 1,352.19 = 285.15 : x
  2. Step 2: Convert to fraction form
    901.47/1,352.19 = 285.15/x
  3. Step 3: Cross multiply
    901.47x = 1,352.19 × 285.15
  4. Step 4: Simplify right side
    901.47x = 385,576.98
  5. Step 5: Solve for x
    x = 385,576.98/901.47
  6. Step 6: Final answer
    x = 427.72

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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.