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Finding the Fourth Proportional to 1,335.58, 2,003.10 and 361.45

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Solution

The fourth proportional to 1,335.58, 2,003.10 and 361.45 is: 542.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.58 : 2,003.10 = 361.45 : x
  2. Step 2: Convert to fraction form
    1,335.58/2,003.10 = 361.45/x
  3. Step 3: Cross multiply
    1,335.58x = 2,003.10 × 361.45
  4. Step 4: Simplify right side
    1,335.58x = 724,020.50
  5. Step 5: Solve for x
    x = 724,020.50/1,335.58
  6. Step 6: Final answer
    x = 542.10

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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.