Home / 1,394.32-1,921.82-1,113.64

Finding the Fourth Proportional to 1,394.32, 1,921.82 and 1,113.64

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Solution

The fourth proportional to 1,394.32, 1,921.82 and 1,113.64 is: 1,534.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.32 : 1,921.82 = 1,113.64 : x
  2. Step 2: Convert to fraction form
    1,394.32/1,921.82 = 1,113.64/x
  3. Step 3: Cross multiply
    1,394.32x = 1,921.82 × 1,113.64
  4. Step 4: Simplify right side
    1,394.32x = 2,140,215.62
  5. Step 5: Solve for x
    x = 2,140,215.62/1,394.32
  6. Step 6: Final answer
    x = 1,534.95

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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.