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Finding the Fourth Proportional to 841.50, 1,261.31 and 635.40

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Solution

The fourth proportional to 841.50, 1,261.31 and 635.40 is: 952.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.50 : 1,261.31 = 635.40 : x
  2. Step 2: Convert to fraction form
    841.50/1,261.31 = 635.40/x
  3. Step 3: Cross multiply
    841.50x = 1,261.31 × 635.40
  4. Step 4: Simplify right side
    841.50x = 801,433.20
  5. Step 5: Solve for x
    x = 801,433.20/841.50
  6. Step 6: Final answer
    x = 952.39

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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.