Home / 3,218.76-4,441.92-1,783.20

Finding the Fourth Proportional to 3,218.76, 4,441.92 and 1,783.20

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Solution

The fourth proportional to 3,218.76, 4,441.92 and 1,783.20 is: 2,460.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.76 : 4,441.92 = 1,783.20 : x
  2. Step 2: Convert to fraction form
    3,218.76/4,441.92 = 1,783.20/x
  3. Step 3: Cross multiply
    3,218.76x = 4,441.92 × 1,783.20
  4. Step 4: Simplify right side
    3,218.76x = 7,920,831.74
  5. Step 5: Solve for x
    x = 7,920,831.74/3,218.76
  6. Step 6: Final answer
    x = 2,460.83

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.