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Finding the Fourth Proportional to 639,464.83, 959,295.66 and 212,854.33

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Solution

The fourth proportional to 639,464.83, 959,295.66 and 212,854.33 is: 319,314.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,464.83 : 959,295.66 = 212,854.33 : x
  2. Step 2: Convert to fraction form
    639,464.83/959,295.66 = 212,854.33/x
  3. Step 3: Cross multiply
    639,464.83x = 959,295.66 × 212,854.33
  4. Step 4: Simplify right side
    639,464.83x = 204,190,235,382.12
  5. Step 5: Solve for x
    x = 204,190,235,382.12/639,464.83
  6. Step 6: Final answer
    x = 319,314.26

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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.