Home / 1,339.38-1,994.82-1,319.16

Finding the Fourth Proportional to 1,339.38, 1,994.82 and 1,319.16

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Solution

The fourth proportional to 1,339.38, 1,994.82 and 1,319.16 is: 1,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.38 : 1,994.82 = 1,319.16 : x
  2. Step 2: Convert to fraction form
    1,339.38/1,994.82 = 1,319.16/x
  3. Step 3: Cross multiply
    1,339.38x = 1,994.82 × 1,319.16
  4. Step 4: Simplify right side
    1,339.38x = 2,631,486.75
  5. Step 5: Solve for x
    x = 2,631,486.75/1,339.38
  6. Step 6: Final answer
    x = 1,964.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.