Home / 1,319.40-1,979.26-453.96

Finding the Fourth Proportional to 1,319.40, 1,979.26 and 453.96

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Solution

The fourth proportional to 1,319.40, 1,979.26 and 453.96 is: 681.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.40 : 1,979.26 = 453.96 : x
  2. Step 2: Convert to fraction form
    1,319.40/1,979.26 = 453.96/x
  3. Step 3: Cross multiply
    1,319.40x = 1,979.26 × 453.96
  4. Step 4: Simplify right side
    1,319.40x = 898,504.87
  5. Step 5: Solve for x
    x = 898,504.87/1,319.40
  6. Step 6: Final answer
    x = 681.00

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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.