Home / 1,313.20-1,969.80-1,305.10

Finding the Fourth Proportional to 1,313.20, 1,969.80 and 1,305.10

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Solution

The fourth proportional to 1,313.20, 1,969.80 and 1,305.10 is: 1,957.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.20 : 1,969.80 = 1,305.10 : x
  2. Step 2: Convert to fraction form
    1,313.20/1,969.80 = 1,305.10/x
  3. Step 3: Cross multiply
    1,313.20x = 1,969.80 × 1,305.10
  4. Step 4: Simplify right side
    1,313.20x = 2,570,785.98
  5. Step 5: Solve for x
    x = 2,570,785.98/1,313.20
  6. Step 6: Final answer
    x = 1,957.65

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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.