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Finding the Fourth Proportional to 841.68, 1,262.42 and 225.45

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Solution

The fourth proportional to 841.68, 1,262.42 and 225.45 is: 338.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.68 : 1,262.42 = 225.45 : x
  2. Step 2: Convert to fraction form
    841.68/1,262.42 = 225.45/x
  3. Step 3: Cross multiply
    841.68x = 1,262.42 × 225.45
  4. Step 4: Simplify right side
    841.68x = 284,616.31
  5. Step 5: Solve for x
    x = 284,616.31/841.68
  6. Step 6: Final answer
    x = 338.15

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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.