Home / 3,129.87-4,319.63-1,785.95

Finding the Fourth Proportional to 3,129.87, 4,319.63 and 1,785.95

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Solution

The fourth proportional to 3,129.87, 4,319.63 and 1,785.95 is: 2,464.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.87 : 4,319.63 = 1,785.95 : x
  2. Step 2: Convert to fraction form
    3,129.87/4,319.63 = 1,785.95/x
  3. Step 3: Cross multiply
    3,129.87x = 4,319.63 × 1,785.95
  4. Step 4: Simplify right side
    3,129.87x = 7,714,635.57
  5. Step 5: Solve for x
    x = 7,714,635.57/3,129.87
  6. Step 6: Final answer
    x = 2,464.84

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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.