Home / 643,355.26-887,936.28-356,967.61

Finding the Fourth Proportional to 643,355.26, 887,936.28 and 356,967.61

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Solution

The fourth proportional to 643,355.26, 887,936.28 and 356,967.61 is: 492,674.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,355.26 : 887,936.28 = 356,967.61 : x
  2. Step 2: Convert to fraction form
    643,355.26/887,936.28 = 356,967.61/x
  3. Step 3: Cross multiply
    643,355.26x = 887,936.28 × 356,967.61
  4. Step 4: Simplify right side
    643,355.26x = 316,964,488,145.42
  5. Step 5: Solve for x
    x = 316,964,488,145.42/643,355.26
  6. Step 6: Final answer
    x = 492,674.12

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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.