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Finding the Fourth Proportional to 1,394.78, 1,924.38 and 797.25

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Solution

The fourth proportional to 1,394.78, 1,924.38 and 797.25 is: 1,099.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.78 : 1,924.38 = 797.25 : x
  2. Step 2: Convert to fraction form
    1,394.78/1,924.38 = 797.25/x
  3. Step 3: Cross multiply
    1,394.78x = 1,924.38 × 797.25
  4. Step 4: Simplify right side
    1,394.78x = 1,534,211.96
  5. Step 5: Solve for x
    x = 1,534,211.96/1,394.78
  6. Step 6: Final answer
    x = 1,099.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.