Home / 428,937.17-642,987.38-204,237.23

Finding the Fourth Proportional to 428,937.17, 642,987.38 and 204,237.23

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Solution

The fourth proportional to 428,937.17, 642,987.38 and 204,237.23 is: 306,156.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,937.17 : 642,987.38 = 204,237.23 : x
  2. Step 2: Convert to fraction form
    428,937.17/642,987.38 = 204,237.23/x
  3. Step 3: Cross multiply
    428,937.17x = 642,987.38 × 204,237.23
  4. Step 4: Simplify right side
    428,937.17x = 131,321,958,711.81
  5. Step 5: Solve for x
    x = 131,321,958,711.81/428,937.17
  6. Step 6: Final answer
    x = 306,156.63

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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.