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Finding the Fourth Proportional to 639,862.47, 959,969.03 and 279,968.07

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Solution

The fourth proportional to 639,862.47, 959,969.03 and 279,968.07 is: 420,028.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,862.47 : 959,969.03 = 279,968.07 : x
  2. Step 2: Convert to fraction form
    639,862.47/959,969.03 = 279,968.07/x
  3. Step 3: Cross multiply
    639,862.47x = 959,969.03 × 279,968.07
  4. Step 4: Simplify right side
    639,862.47x = 268,760,676,588.87
  5. Step 5: Solve for x
    x = 268,760,676,588.87/639,862.47
  6. Step 6: Final answer
    x = 420,028.82

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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.