Home / 3,129.62-4,319.96-1,803.86

Finding the Fourth Proportional to 3,129.62, 4,319.96 and 1,803.86

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Solution

The fourth proportional to 3,129.62, 4,319.96 and 1,803.86 is: 2,489.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.62 : 4,319.96 = 1,803.86 : x
  2. Step 2: Convert to fraction form
    3,129.62/4,319.96 = 1,803.86/x
  3. Step 3: Cross multiply
    3,129.62x = 4,319.96 × 1,803.86
  4. Step 4: Simplify right side
    3,129.62x = 7,792,603.05
  5. Step 5: Solve for x
    x = 7,792,603.05/3,129.62
  6. Step 6: Final answer
    x = 2,489.95

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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.