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Finding the Fourth Proportional to 1,226.75, 1,840.13 and 542.75

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Solution

The fourth proportional to 1,226.75, 1,840.13 and 542.75 is: 814.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.75 : 1,840.13 = 542.75 : x
  2. Step 2: Convert to fraction form
    1,226.75/1,840.13 = 542.75/x
  3. Step 3: Cross multiply
    1,226.75x = 1,840.13 × 542.75
  4. Step 4: Simplify right side
    1,226.75x = 998,727.84
  5. Step 5: Solve for x
    x = 998,727.84/1,226.75
  6. Step 6: Final answer
    x = 814.13

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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.