Home / 4,279.80-6,419.70-3,307.80

Finding the Fourth Proportional to 4,279.80, 6,419.70 and 3,307.80

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Solution

The fourth proportional to 4,279.80, 6,419.70 and 3,307.80 is: 4,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,279.80 : 6,419.70 = 3,307.80 : x
  2. Step 2: Convert to fraction form
    4,279.80/6,419.70 = 3,307.80/x
  3. Step 3: Cross multiply
    4,279.80x = 6,419.70 × 3,307.80
  4. Step 4: Simplify right side
    4,279.80x = 21,235,083.66
  5. Step 5: Solve for x
    x = 21,235,083.66/4,279.80
  6. Step 6: Final answer
    x = 4,961.70

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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.