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Finding the Fourth Proportional to 1,002.88, 1,504.31 and 272.45

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Solution

The fourth proportional to 1,002.88, 1,504.31 and 272.45 is: 408.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.88 : 1,504.31 = 272.45 : x
  2. Step 2: Convert to fraction form
    1,002.88/1,504.31 = 272.45/x
  3. Step 3: Cross multiply
    1,002.88x = 1,504.31 × 272.45
  4. Step 4: Simplify right side
    1,002.88x = 409,843.20
  5. Step 5: Solve for x
    x = 409,843.20/1,002.88
  6. Step 6: Final answer
    x = 408.67

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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.