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Finding the Fourth Proportional to 1,394.15, 2,091.91 and 572.66

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Solution

The fourth proportional to 1,394.15, 2,091.91 and 572.66 is: 859.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.15 : 2,091.91 = 572.66 : x
  2. Step 2: Convert to fraction form
    1,394.15/2,091.91 = 572.66/x
  3. Step 3: Cross multiply
    1,394.15x = 2,091.91 × 572.66
  4. Step 4: Simplify right side
    1,394.15x = 1,197,957.70
  5. Step 5: Solve for x
    x = 1,197,957.70/1,394.15
  6. Step 6: Final answer
    x = 859.27

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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.