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Finding the Fourth Proportional to 841.20, 1,261.77 and 475.22

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Solution

The fourth proportional to 841.20, 1,261.77 and 475.22 is: 712.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.20 : 1,261.77 = 475.22 : x
  2. Step 2: Convert to fraction form
    841.20/1,261.77 = 475.22/x
  3. Step 3: Cross multiply
    841.20x = 1,261.77 × 475.22
  4. Step 4: Simplify right side
    841.20x = 599,612.03
  5. Step 5: Solve for x
    x = 599,612.03/841.20
  6. Step 6: Final answer
    x = 712.81

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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.