Home / 428,908.50-643,362.77-293,839.38

Finding the Fourth Proportional to 428,908.50, 643,362.77 and 293,839.38

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Solution

The fourth proportional to 428,908.50, 643,362.77 and 293,839.38 is: 440,759.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,908.50 : 643,362.77 = 293,839.38 : x
  2. Step 2: Convert to fraction form
    428,908.50/643,362.77 = 293,839.38/x
  3. Step 3: Cross multiply
    428,908.50x = 643,362.77 × 293,839.38
  4. Step 4: Simplify right side
    428,908.50x = 189,045,317,451.88
  5. Step 5: Solve for x
    x = 189,045,317,451.88/428,908.50
  6. Step 6: Final answer
    x = 440,759.08

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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.