Home / 1,142.30-1,713.25-320.37

Finding the Fourth Proportional to 1,142.30, 1,713.25 and 320.37

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Solution

The fourth proportional to 1,142.30, 1,713.25 and 320.37 is: 480.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.30 : 1,713.25 = 320.37 : x
  2. Step 2: Convert to fraction form
    1,142.30/1,713.25 = 320.37/x
  3. Step 3: Cross multiply
    1,142.30x = 1,713.25 × 320.37
  4. Step 4: Simplify right side
    1,142.30x = 548,873.90
  5. Step 5: Solve for x
    x = 548,873.90/1,142.30
  6. Step 6: Final answer
    x = 480.50

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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.