Home / 1,142.08-1,713.41-320.36

Finding the Fourth Proportional to 1,142.08, 1,713.41 and 320.36

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Solution

The fourth proportional to 1,142.08, 1,713.41 and 320.36 is: 480.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.08 : 1,713.41 = 320.36 : x
  2. Step 2: Convert to fraction form
    1,142.08/1,713.41 = 320.36/x
  3. Step 3: Cross multiply
    1,142.08x = 1,713.41 × 320.36
  4. Step 4: Simplify right side
    1,142.08x = 548,908.03
  5. Step 5: Solve for x
    x = 548,908.03/1,142.08
  6. Step 6: Final answer
    x = 480.62

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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.