Home / 428,826.25-643,239.38-293,757.13

Finding the Fourth Proportional to 428,826.25, 643,239.38 and 293,757.13

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Solution

The fourth proportional to 428,826.25, 643,239.38 and 293,757.13 is: 440,635.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,826.25 : 643,239.38 = 293,757.13 : x
  2. Step 2: Convert to fraction form
    428,826.25/643,239.38 = 293,757.13/x
  3. Step 3: Cross multiply
    428,826.25x = 643,239.38 × 293,757.13
  4. Step 4: Simplify right side
    428,826.25x = 188,956,154,171.78
  5. Step 5: Solve for x
    x = 188,956,154,171.78/428,826.25
  6. Step 6: Final answer
    x = 440,635.70

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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.