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Finding the Fourth Proportional to 1,394.09, 2,091.94 and 572.95

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Solution

The fourth proportional to 1,394.09, 2,091.94 and 572.95 is: 859.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.09 : 2,091.94 = 572.95 : x
  2. Step 2: Convert to fraction form
    1,394.09/2,091.94 = 572.95/x
  3. Step 3: Cross multiply
    1,394.09x = 2,091.94 × 572.95
  4. Step 4: Simplify right side
    1,394.09x = 1,198,577.02
  5. Step 5: Solve for x
    x = 1,198,577.02/1,394.09
  6. Step 6: Final answer
    x = 859.76

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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.