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Finding the Fourth Proportional to 664,713.10, 996,860.51 and 215,329.71

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Solution

The fourth proportional to 664,713.10, 996,860.51 and 215,329.71 is: 322,926.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,713.10 : 996,860.51 = 215,329.71 : x
  2. Step 2: Convert to fraction form
    664,713.10/996,860.51 = 215,329.71/x
  3. Step 3: Cross multiply
    664,713.10x = 996,860.51 × 215,329.71
  4. Step 4: Simplify right side
    664,713.10x = 214,653,684,528.75
  5. Step 5: Solve for x
    x = 214,653,684,528.75/664,713.10
  6. Step 6: Final answer
    x = 322,926.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.