Home / 643,384.80-887,977.62-356,997.15

Finding the Fourth Proportional to 643,384.80, 887,977.62 and 356,997.15

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Solution

The fourth proportional to 643,384.80, 887,977.62 and 356,997.15 is: 492,715.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,384.80 : 887,977.62 = 356,997.15 : x
  2. Step 2: Convert to fraction form
    643,384.80/887,977.62 = 356,997.15/x
  3. Step 3: Cross multiply
    643,384.80x = 887,977.62 × 356,997.15
  4. Step 4: Simplify right side
    643,384.80x = 317,005,479,603.78
  5. Step 5: Solve for x
    x = 317,005,479,603.78/643,384.80
  6. Step 6: Final answer
    x = 492,715.21

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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.