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Finding the Fourth Proportional to 2,185.61, 3,278.37 and 542.14

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Solution

The fourth proportional to 2,185.61, 3,278.37 and 542.14 is: 813.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.61 : 3,278.37 = 542.14 : x
  2. Step 2: Convert to fraction form
    2,185.61/3,278.37 = 542.14/x
  3. Step 3: Cross multiply
    2,185.61x = 3,278.37 × 542.14
  4. Step 4: Simplify right side
    2,185.61x = 1,777,327.32
  5. Step 5: Solve for x
    x = 1,777,327.32/2,185.61
  6. Step 6: Final answer
    x = 813.20

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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.