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Finding the Fourth Proportional to 627,715.89, 866,229.66 and 355,808.79

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Solution

The fourth proportional to 627,715.89, 866,229.66 and 355,808.79 is: 491,005.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,715.89 : 866,229.66 = 355,808.79 : x
  2. Step 2: Convert to fraction form
    627,715.89/866,229.66 = 355,808.79/x
  3. Step 3: Cross multiply
    627,715.89x = 866,229.66 × 355,808.79
  4. Step 4: Simplify right side
    627,715.89x = 308,212,127,186.71
  5. Step 5: Solve for x
    x = 308,212,127,186.71/627,715.89
  6. Step 6: Final answer
    x = 491,005.78

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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.