Home / 4,279.37-6,419.80-1,317.78

Finding the Fourth Proportional to 4,279.37, 6,419.80 and 1,317.78

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Solution

The fourth proportional to 4,279.37, 6,419.80 and 1,317.78 is: 1,976.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,279.37 : 6,419.80 = 1,317.78 : x
  2. Step 2: Convert to fraction form
    4,279.37/6,419.80 = 1,317.78/x
  3. Step 3: Cross multiply
    4,279.37x = 6,419.80 × 1,317.78
  4. Step 4: Simplify right side
    4,279.37x = 8,459,903.39
  5. Step 5: Solve for x
    x = 8,459,903.39/4,279.37
  6. Step 6: Final answer
    x = 1,976.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.