Home / 1,245.16-1,867.60-320.68

Finding the Fourth Proportional to 1,245.16, 1,867.60 and 320.68

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Solution

The fourth proportional to 1,245.16, 1,867.60 and 320.68 is: 480.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.16 : 1,867.60 = 320.68 : x
  2. Step 2: Convert to fraction form
    1,245.16/1,867.60 = 320.68/x
  3. Step 3: Cross multiply
    1,245.16x = 1,867.60 × 320.68
  4. Step 4: Simplify right side
    1,245.16x = 598,901.97
  5. Step 5: Solve for x
    x = 598,901.97/1,245.16
  6. Step 6: Final answer
    x = 480.98

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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.