Home / 1,319.70-1,979.55-1,179.30

Finding the Fourth Proportional to 1,319.70, 1,979.55 and 1,179.30

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Solution

The fourth proportional to 1,319.70, 1,979.55 and 1,179.30 is: 1,768.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.70 : 1,979.55 = 1,179.30 : x
  2. Step 2: Convert to fraction form
    1,319.70/1,979.55 = 1,179.30/x
  3. Step 3: Cross multiply
    1,319.70x = 1,979.55 × 1,179.30
  4. Step 4: Simplify right side
    1,319.70x = 2,334,483.32
  5. Step 5: Solve for x
    x = 2,334,483.32/1,319.70
  6. Step 6: Final answer
    x = 1,768.95

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Similar ratio
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1.5x scale

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.