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Finding the Fourth Proportional to 1,087.33, 1,629.84 and 356.71

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Solution

The fourth proportional to 1,087.33, 1,629.84 and 356.71 is: 534.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.33 : 1,629.84 = 356.71 : x
  2. Step 2: Convert to fraction form
    1,087.33/1,629.84 = 356.71/x
  3. Step 3: Cross multiply
    1,087.33x = 1,629.84 × 356.71
  4. Step 4: Simplify right side
    1,087.33x = 581,380.23
  5. Step 5: Solve for x
    x = 581,380.23/1,087.33
  6. Step 6: Final answer
    x = 534.69

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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.