Home / 3,129.71-4,318.85-1,803.60

Finding the Fourth Proportional to 3,129.71, 4,318.85 and 1,803.60

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Solution

The fourth proportional to 3,129.71, 4,318.85 and 1,803.60 is: 2,488.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.71 : 4,318.85 = 1,803.60 : x
  2. Step 2: Convert to fraction form
    3,129.71/4,318.85 = 1,803.60/x
  3. Step 3: Cross multiply
    3,129.71x = 4,318.85 × 1,803.60
  4. Step 4: Simplify right side
    3,129.71x = 7,789,482.37
  5. Step 5: Solve for x
    x = 7,789,482.37/3,129.71
  6. Step 6: Final answer
    x = 2,488.89

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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.