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Finding the Fourth Proportional to 1,394.78, 2,092.17 and 470.09

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Solution

The fourth proportional to 1,394.78, 2,092.17 and 470.09 is: 705.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.78 : 2,092.17 = 470.09 : x
  2. Step 2: Convert to fraction form
    1,394.78/2,092.17 = 470.09/x
  3. Step 3: Cross multiply
    1,394.78x = 2,092.17 × 470.09
  4. Step 4: Simplify right side
    1,394.78x = 983,497.73
  5. Step 5: Solve for x
    x = 983,497.73/1,394.78
  6. Step 6: Final answer
    x = 705.13

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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.