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Finding the Fourth Proportional to 1,840.94, 2,762 and 542.42

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Solution

The fourth proportional to 1,840.94, 2,762 and 542.42 is: 813.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.94 : 2,762 = 542.42 : x
  2. Step 2: Convert to fraction form
    1,840.94/2,762 = 542.42/x
  3. Step 3: Cross multiply
    1,840.94x = 2,762 × 542.42
  4. Step 4: Simplify right side
    1,840.94x = 1,498,164.04
  5. Step 5: Solve for x
    x = 1,498,164.04/1,840.94
  6. Step 6: Final answer
    x = 813.80

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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.