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Finding the Fourth Proportional to 639,715.30, 959,135.55 and 302,917.30

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Solution

The fourth proportional to 639,715.30, 959,135.55 and 302,917.30 is: 454,168.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,715.30 : 959,135.55 = 302,917.30 : x
  2. Step 2: Convert to fraction form
    639,715.30/959,135.55 = 302,917.30/x
  3. Step 3: Cross multiply
    639,715.30x = 959,135.55 × 302,917.30
  4. Step 4: Simplify right side
    639,715.30x = 290,538,751,140.02
  5. Step 5: Solve for x
    x = 290,538,751,140.02/639,715.30
  6. Step 6: Final answer
    x = 454,168.83

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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.