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Finding the Fourth Proportional to 1,004.87, 1,507.11 and 274.39

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Solution

The fourth proportional to 1,004.87, 1,507.11 and 274.39 is: 411.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.87 : 1,507.11 = 274.39 : x
  2. Step 2: Convert to fraction form
    1,004.87/1,507.11 = 274.39/x
  3. Step 3: Cross multiply
    1,004.87x = 1,507.11 × 274.39
  4. Step 4: Simplify right side
    1,004.87x = 413,531.12
  5. Step 5: Solve for x
    x = 413,531.12/1,004.87
  6. Step 6: Final answer
    x = 411.53

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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.