Home / 643,428.72-887,932.68-356,948.80

Finding the Fourth Proportional to 643,428.72, 887,932.68 and 356,948.80

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Solution

The fourth proportional to 643,428.72, 887,932.68 and 356,948.80 is: 492,589.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,428.72 : 887,932.68 = 356,948.80 : x
  2. Step 2: Convert to fraction form
    643,428.72/887,932.68 = 356,948.80/x
  3. Step 3: Cross multiply
    643,428.72x = 887,932.68 × 356,948.80
  4. Step 4: Simplify right side
    643,428.72x = 316,946,504,606.78
  5. Step 5: Solve for x
    x = 316,946,504,606.78/643,428.72
  6. Step 6: Final answer
    x = 492,589.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.