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Finding the Fourth Proportional to 643,622.94, 888,372 and 401,759.91

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Solution

The fourth proportional to 643,622.94, 888,372 and 401,759.91 is: 554,536.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,622.94 : 888,372 = 401,759.91 : x
  2. Step 2: Convert to fraction form
    643,622.94/888,372 = 401,759.91/x
  3. Step 3: Cross multiply
    643,622.94x = 888,372 × 401,759.91
  4. Step 4: Simplify right side
    643,622.94x = 356,912,254,766.52
  5. Step 5: Solve for x
    x = 356,912,254,766.52/643,622.94
  6. Step 6: Final answer
    x = 554,536.25

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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.