Home / 428,778.42-643,553.12-229,269.34

Finding the Fourth Proportional to 428,778.42, 643,553.12 and 229,269.34

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Solution

The fourth proportional to 428,778.42, 643,553.12 and 229,269.34 is: 344,110.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,778.42 : 643,553.12 = 229,269.34 : x
  2. Step 2: Convert to fraction form
    428,778.42/643,553.12 = 229,269.34/x
  3. Step 3: Cross multiply
    428,778.42x = 643,553.12 × 229,269.34
  4. Step 4: Simplify right side
    428,778.42x = 147,546,999,077.34
  5. Step 5: Solve for x
    x = 147,546,999,077.34/428,778.42
  6. Step 6: Final answer
    x = 344,110.13

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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.