Home / 3,129.45-4,318.16-1,803.35

Finding the Fourth Proportional to 3,129.45, 4,318.16 and 1,803.35

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Solution

The fourth proportional to 3,129.45, 4,318.16 and 1,803.35 is: 2,488.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.45 : 4,318.16 = 1,803.35 : x
  2. Step 2: Convert to fraction form
    3,129.45/4,318.16 = 1,803.35/x
  3. Step 3: Cross multiply
    3,129.45x = 4,318.16 × 1,803.35
  4. Step 4: Simplify right side
    3,129.45x = 7,787,123.23
  5. Step 5: Solve for x
    x = 7,787,123.23/3,129.45
  6. Step 6: Final answer
    x = 2,488.34

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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.