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Finding the Fourth Proportional to 639,807.73, 959,613.18 and 213,350.97

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Solution

The fourth proportional to 639,807.73, 959,613.18 and 213,350.97 is: 319,993.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,807.73 : 959,613.18 = 213,350.97 : x
  2. Step 2: Convert to fraction form
    639,807.73/959,613.18 = 213,350.97/x
  3. Step 3: Cross multiply
    639,807.73x = 959,613.18 × 213,350.97
  4. Step 4: Simplify right side
    639,807.73x = 204,734,402,777.79
  5. Step 5: Solve for x
    x = 204,734,402,777.79/639,807.73
  6. Step 6: Final answer
    x = 319,993.64

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1.5x scale

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.