Home / 643,386.47-887,979.77-356,998.82

Finding the Fourth Proportional to 643,386.47, 887,979.77 and 356,998.82

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Solution

The fourth proportional to 643,386.47, 887,979.77 and 356,998.82 is: 492,717.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,386.47 : 887,979.77 = 356,998.82 : x
  2. Step 2: Convert to fraction form
    643,386.47/887,979.77 = 356,998.82/x
  3. Step 3: Cross multiply
    643,386.47x = 887,979.77 × 356,998.82
  4. Step 4: Simplify right side
    643,386.47x = 317,007,723,848.98
  5. Step 5: Solve for x
    x = 317,007,723,848.98/643,386.47
  6. Step 6: Final answer
    x = 492,717.43

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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.