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Finding the Fourth Proportional to 1,002.63, 1,503.93 and 272.20

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Solution

The fourth proportional to 1,002.63, 1,503.93 and 272.20 is: 408.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.63 : 1,503.93 = 272.20 : x
  2. Step 2: Convert to fraction form
    1,002.63/1,503.93 = 272.20/x
  3. Step 3: Cross multiply
    1,002.63x = 1,503.93 × 272.20
  4. Step 4: Simplify right side
    1,002.63x = 409,369.83
  5. Step 5: Solve for x
    x = 409,369.83/1,002.63
  6. Step 6: Final answer
    x = 408.30

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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.