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Finding the Fourth Proportional to 849.56, 1,272.78 and 541.46

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Solution

The fourth proportional to 849.56, 1,272.78 and 541.46 is: 811.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.56 : 1,272.78 = 541.46 : x
  2. Step 2: Convert to fraction form
    849.56/1,272.78 = 541.46/x
  3. Step 3: Cross multiply
    849.56x = 1,272.78 × 541.46
  4. Step 4: Simplify right side
    849.56x = 689,159.46
  5. Step 5: Solve for x
    x = 689,159.46/849.56
  6. Step 6: Final answer
    x = 811.20

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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.