Home / 643,217.53-887,694.70-356,829.88

Finding the Fourth Proportional to 643,217.53, 887,694.70 and 356,829.88

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Solution

The fourth proportional to 643,217.53, 887,694.70 and 356,829.88 is: 492,455.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,217.53 : 887,694.70 = 356,829.88 : x
  2. Step 2: Convert to fraction form
    643,217.53/887,694.70 = 356,829.88/x
  3. Step 3: Cross multiply
    643,217.53x = 887,694.70 × 356,829.88
  4. Step 4: Simplify right side
    643,217.53x = 316,755,993,277.64
  5. Step 5: Solve for x
    x = 316,755,993,277.64/643,217.53
  6. Step 6: Final answer
    x = 492,455.47

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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.