Home / 428,926.20-642,970.87-204,226.26

Finding the Fourth Proportional to 428,926.20, 642,970.87 and 204,226.26

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Solution

The fourth proportional to 428,926.20, 642,970.87 and 204,226.26 is: 306,140.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,926.20 : 642,970.87 = 204,226.26 : x
  2. Step 2: Convert to fraction form
    428,926.20/642,970.87 = 204,226.26/x
  3. Step 3: Cross multiply
    428,926.20x = 642,970.87 × 204,226.26
  4. Step 4: Simplify right side
    428,926.20x = 131,311,536,069.05
  5. Step 5: Solve for x
    x = 131,311,536,069.05/428,926.20
  6. Step 6: Final answer
    x = 306,140.16

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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.