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Finding the Fourth Proportional to 901.40, 1,342.13 and 847.96

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Solution

The fourth proportional to 901.40, 1,342.13 and 847.96 is: 1,262.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.40 : 1,342.13 = 847.96 : x
  2. Step 2: Convert to fraction form
    901.40/1,342.13 = 847.96/x
  3. Step 3: Cross multiply
    901.40x = 1,342.13 × 847.96
  4. Step 4: Simplify right side
    901.40x = 1,138,072.55
  5. Step 5: Solve for x
    x = 1,138,072.55/901.40
  6. Step 6: Final answer
    x = 1,262.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.