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Finding the Fourth Proportional to 1,394.49, 2,091.67 and 572.56

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Solution

The fourth proportional to 1,394.49, 2,091.67 and 572.56 is: 858.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.49 : 2,091.67 = 572.56 : x
  2. Step 2: Convert to fraction form
    1,394.49/2,091.67 = 572.56/x
  3. Step 3: Cross multiply
    1,394.49x = 2,091.67 × 572.56
  4. Step 4: Simplify right side
    1,394.49x = 1,197,606.58
  5. Step 5: Solve for x
    x = 1,197,606.58/1,394.49
  6. Step 6: Final answer
    x = 858.81

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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.