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Finding the Fourth Proportional to 1,892.15, 2,838.93 and 851.84

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Solution

The fourth proportional to 1,892.15, 2,838.93 and 851.84 is: 1,278.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,892.15 : 2,838.93 = 851.84 : x
  2. Step 2: Convert to fraction form
    1,892.15/2,838.93 = 851.84/x
  3. Step 3: Cross multiply
    1,892.15x = 2,838.93 × 851.84
  4. Step 4: Simplify right side
    1,892.15x = 2,418,314.13
  5. Step 5: Solve for x
    x = 2,418,314.13/1,892.15
  6. Step 6: Final answer
    x = 1,278.08

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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.