Home / 643,269.12-887,711.98-356,789.22

Finding the Fourth Proportional to 643,269.12, 887,711.98 and 356,789.22

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Solution

The fourth proportional to 643,269.12, 887,711.98 and 356,789.22 is: 492,369.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,269.12 : 887,711.98 = 356,789.22 : x
  2. Step 2: Convert to fraction form
    643,269.12/887,711.98 = 356,789.22/x
  3. Step 3: Cross multiply
    643,269.12x = 887,711.98 × 356,789.22
  4. Step 4: Simplify right side
    643,269.12x = 316,726,064,928.86
  5. Step 5: Solve for x
    x = 316,726,064,928.86/643,269.12
  6. Step 6: Final answer
    x = 492,369.45

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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.