Home / 3,129.72-4,319.03-1,803.69

Finding the Fourth Proportional to 3,129.72, 4,319.03 and 1,803.69

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Solution

The fourth proportional to 3,129.72, 4,319.03 and 1,803.69 is: 2,489.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.72 : 4,319.03 = 1,803.69 : x
  2. Step 2: Convert to fraction form
    3,129.72/4,319.03 = 1,803.69/x
  3. Step 3: Cross multiply
    3,129.72x = 4,319.03 × 1,803.69
  4. Step 4: Simplify right side
    3,129.72x = 7,790,182.20
  5. Step 5: Solve for x
    x = 7,790,182.20/3,129.72
  6. Step 6: Final answer
    x = 2,489.10

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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.