Home / 428,286.80-642,068.94-270,166.70

Finding the Fourth Proportional to 428,286.80, 642,068.94 and 270,166.70

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Solution

The fourth proportional to 428,286.80, 642,068.94 and 270,166.70 is: 405,022.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,286.80 : 642,068.94 = 270,166.70 : x
  2. Step 2: Convert to fraction form
    428,286.80/642,068.94 = 270,166.70/x
  3. Step 3: Cross multiply
    428,286.80x = 642,068.94 × 270,166.70
  4. Step 4: Simplify right side
    428,286.80x = 173,465,646,692.30
  5. Step 5: Solve for x
    x = 173,465,646,692.30/428,286.80
  6. Step 6: Final answer
    x = 405,022.16

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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.