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Finding the Fourth Proportional to 1,335.67, 2,002.75 and 555.43

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Solution

The fourth proportional to 1,335.67, 2,002.75 and 555.43 is: 832.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.67 : 2,002.75 = 555.43 : x
  2. Step 2: Convert to fraction form
    1,335.67/2,002.75 = 555.43/x
  3. Step 3: Cross multiply
    1,335.67x = 2,002.75 × 555.43
  4. Step 4: Simplify right side
    1,335.67x = 1,112,387.43
  5. Step 5: Solve for x
    x = 1,112,387.43/1,335.67
  6. Step 6: Final answer
    x = 832.83

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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.