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Finding the Fourth Proportional to 639,802.73, 959,605.68 and 213,345.97

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Solution

The fourth proportional to 639,802.73, 959,605.68 and 213,345.97 is: 319,986.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,802.73 : 959,605.68 = 213,345.97 : x
  2. Step 2: Convert to fraction form
    639,802.73/959,605.68 = 213,345.97/x
  3. Step 3: Cross multiply
    639,802.73x = 959,605.68 × 213,345.97
  4. Step 4: Simplify right side
    639,802.73x = 204,728,004,617.11
  5. Step 5: Solve for x
    x = 204,728,004,617.11/639,802.73
  6. Step 6: Final answer
    x = 319,986.14

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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.