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Finding the Fourth Proportional to 1,272.08, 1,908.12 and 541.46

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Solution

The fourth proportional to 1,272.08, 1,908.12 and 541.46 is: 812.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.08 : 1,908.12 = 541.46 : x
  2. Step 2: Convert to fraction form
    1,272.08/1,908.12 = 541.46/x
  3. Step 3: Cross multiply
    1,272.08x = 1,908.12 × 541.46
  4. Step 4: Simplify right side
    1,272.08x = 1,033,170.66
  5. Step 5: Solve for x
    x = 1,033,170.66/1,272.08
  6. Step 6: Final answer
    x = 812.19

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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.