Home / 3,129.81-4,319.24-1,803.57

Finding the Fourth Proportional to 3,129.81, 4,319.24 and 1,803.57

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Solution

The fourth proportional to 3,129.81, 4,319.24 and 1,803.57 is: 2,488.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.81 : 4,319.24 = 1,803.57 : x
  2. Step 2: Convert to fraction form
    3,129.81/4,319.24 = 1,803.57/x
  3. Step 3: Cross multiply
    3,129.81x = 4,319.24 × 1,803.57
  4. Step 4: Simplify right side
    3,129.81x = 7,790,042.67
  5. Step 5: Solve for x
    x = 7,790,042.67/3,129.81
  6. Step 6: Final answer
    x = 2,488.98

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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.