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Finding the Fourth Proportional to 1,335.55, 2,003.42 and 361.64

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Solution

The fourth proportional to 1,335.55, 2,003.42 and 361.64 is: 542.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.55 : 2,003.42 = 361.64 : x
  2. Step 2: Convert to fraction form
    1,335.55/2,003.42 = 361.64/x
  3. Step 3: Cross multiply
    1,335.55x = 2,003.42 × 361.64
  4. Step 4: Simplify right side
    1,335.55x = 724,507.70
  5. Step 5: Solve for x
    x = 724,507.70/1,335.55
  6. Step 6: Final answer
    x = 542.48

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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.