Home / 428,093.20-591,165.72-320,476.40

Finding the Fourth Proportional to 428,093.20, 591,165.72 and 320,476.40

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Solution

The fourth proportional to 428,093.20, 591,165.72 and 320,476.40 is: 442,554.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,093.20 : 591,165.72 = 320,476.40 : x
  2. Step 2: Convert to fraction form
    428,093.20/591,165.72 = 320,476.40/x
  3. Step 3: Cross multiply
    428,093.20x = 591,165.72 × 320,476.40
  4. Step 4: Simplify right side
    428,093.20x = 189,454,661,749.01
  5. Step 5: Solve for x
    x = 189,454,661,749.01/428,093.20
  6. Step 6: Final answer
    x = 442,554.71

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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.