Home / 428,029.20-642,306.24-191,571.84

Finding the Fourth Proportional to 428,029.20, 642,306.24 and 191,571.84

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Solution

The fourth proportional to 428,029.20, 642,306.24 and 191,571.84 is: 287,475.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,029.20 : 642,306.24 = 191,571.84 : x
  2. Step 2: Convert to fraction form
    428,029.20/642,306.24 = 191,571.84/x
  3. Step 3: Cross multiply
    428,029.20x = 642,306.24 × 191,571.84
  4. Step 4: Simplify right side
    428,029.20x = 123,047,788,240.28
  5. Step 5: Solve for x
    x = 123,047,788,240.28/428,029.20
  6. Step 6: Final answer
    x = 287,475.22

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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.