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Finding the Fourth Proportional to 643,855.47, 888,759.14 and 552,845.89

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Solution

The fourth proportional to 643,855.47, 888,759.14 and 552,845.89 is: 763,132.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,855.47 : 888,759.14 = 552,845.89 : x
  2. Step 2: Convert to fraction form
    643,855.47/888,759.14 = 552,845.89/x
  3. Step 3: Cross multiply
    643,855.47x = 888,759.14 × 552,845.89
  4. Step 4: Simplify right side
    643,855.47x = 491,346,836,095.65
  5. Step 5: Solve for x
    x = 491,346,836,095.65/643,855.47
  6. Step 6: Final answer
    x = 763,132.20

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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.