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Finding the Fourth Proportional to 479,176.95, 661,476.74 and 309,493.83

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Solution

The fourth proportional to 479,176.95, 661,476.74 and 309,493.83 is: 427,238.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,176.95 : 661,476.74 = 309,493.83 : x
  2. Step 2: Convert to fraction form
    479,176.95/661,476.74 = 309,493.83/x
  3. Step 3: Cross multiply
    479,176.95x = 661,476.74 × 309,493.83
  4. Step 4: Simplify right side
    479,176.95x = 204,722,968,171.05
  5. Step 5: Solve for x
    x = 204,722,968,171.05/479,176.95
  6. Step 6: Final answer
    x = 427,238.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.