Home / 1,293.36-1,939.22-459.87

Finding the Fourth Proportional to 1,293.36, 1,939.22 and 459.87

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Solution

The fourth proportional to 1,293.36, 1,939.22 and 459.87 is: 689.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.36 : 1,939.22 = 459.87 : x
  2. Step 2: Convert to fraction form
    1,293.36/1,939.22 = 459.87/x
  3. Step 3: Cross multiply
    1,293.36x = 1,939.22 × 459.87
  4. Step 4: Simplify right side
    1,293.36x = 891,789.10
  5. Step 5: Solve for x
    x = 891,789.10/1,293.36
  6. Step 6: Final answer
    x = 689.51

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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.