Home / 428,756.29-643,519.89-229,247.22

Finding the Fourth Proportional to 428,756.29, 643,519.89 and 229,247.22

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Solution

The fourth proportional to 428,756.29, 643,519.89 and 229,247.22 is: 344,076.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,756.29 : 643,519.89 = 229,247.22 : x
  2. Step 2: Convert to fraction form
    428,756.29/643,519.89 = 229,247.22/x
  3. Step 3: Cross multiply
    428,756.29x = 643,519.89 × 229,247.22
  4. Step 4: Simplify right side
    428,756.29x = 147,525,145,797.21
  5. Step 5: Solve for x
    x = 147,525,145,797.21/428,756.29
  6. Step 6: Final answer
    x = 344,076.92

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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.