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Finding the Fourth Proportional to 841.98, 1,261.80 and 495.54

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Solution

The fourth proportional to 841.98, 1,261.80 and 495.54 is: 742.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.98 : 1,261.80 = 495.54 : x
  2. Step 2: Convert to fraction form
    841.98/1,261.80 = 495.54/x
  3. Step 3: Cross multiply
    841.98x = 1,261.80 × 495.54
  4. Step 4: Simplify right side
    841.98x = 625,272.37
  5. Step 5: Solve for x
    x = 625,272.37/841.98
  6. Step 6: Final answer
    x = 742.62

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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.