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Finding the Fourth Proportional to 319,692.57, 479,628.77 and 139,793.82

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Solution

The fourth proportional to 319,692.57, 479,628.77 and 139,793.82 is: 209,730.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,692.57 : 479,628.77 = 139,793.82 : x
  2. Step 2: Convert to fraction form
    319,692.57/479,628.77 = 139,793.82/x
  3. Step 3: Cross multiply
    319,692.57x = 479,628.77 × 139,793.82
  4. Step 4: Simplify right side
    319,692.57x = 67,049,137,940.20
  5. Step 5: Solve for x
    x = 67,049,137,940.20/319,692.57
  6. Step 6: Final answer
    x = 209,730.05

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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.