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Finding the Fourth Proportional to 1,361.55, 2,042.34 and 424.53

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Solution

The fourth proportional to 1,361.55, 2,042.34 and 424.53 is: 636.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.55 : 2,042.34 = 424.53 : x
  2. Step 2: Convert to fraction form
    1,361.55/2,042.34 = 424.53/x
  3. Step 3: Cross multiply
    1,361.55x = 2,042.34 × 424.53
  4. Step 4: Simplify right side
    1,361.55x = 867,034.60
  5. Step 5: Solve for x
    x = 867,034.60/1,361.55
  6. Step 6: Final answer
    x = 636.80

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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.