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Finding the Fourth Proportional to 3,129.99, 4,318.88 and 1,803.63

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Solution

The fourth proportional to 3,129.99, 4,318.88 and 1,803.63 is: 2,488.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.99 : 4,318.88 = 1,803.63 : x
  2. Step 2: Convert to fraction form
    3,129.99/4,318.88 = 1,803.63/x
  3. Step 3: Cross multiply
    3,129.99x = 4,318.88 × 1,803.63
  4. Step 4: Simplify right side
    3,129.99x = 7,789,652.52
  5. Step 5: Solve for x
    x = 7,789,652.52/3,129.99
  6. Step 6: Final answer
    x = 2,488.71

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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.