Home / 643,297.24-887,620.98-388,661.32

Finding the Fourth Proportional to 643,297.24, 887,620.98 and 388,661.32

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Solution

The fourth proportional to 643,297.24, 887,620.98 and 388,661.32 is: 536,274.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,297.24 : 887,620.98 = 388,661.32 : x
  2. Step 2: Convert to fraction form
    643,297.24/887,620.98 = 388,661.32/x
  3. Step 3: Cross multiply
    643,297.24x = 887,620.98 × 388,661.32
  4. Step 4: Simplify right side
    643,297.24x = 344,983,941,746.49
  5. Step 5: Solve for x
    x = 344,983,941,746.49/643,297.24
  6. Step 6: Final answer
    x = 536,274.56

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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.