Home / 643,357.05-887,939.21-356,969.40

Finding the Fourth Proportional to 643,357.05, 887,939.21 and 356,969.40

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Solution

The fourth proportional to 643,357.05, 887,939.21 and 356,969.40 is: 492,676.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,357.05 : 887,939.21 = 356,969.40 : x
  2. Step 2: Convert to fraction form
    643,357.05/887,939.21 = 356,969.40/x
  3. Step 3: Cross multiply
    643,357.05x = 887,939.21 × 356,969.40
  4. Step 4: Simplify right side
    643,357.05x = 316,967,125,245.33
  5. Step 5: Solve for x
    x = 316,967,125,245.33/643,357.05
  6. Step 6: Final answer
    x = 492,676.85

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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.