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Finding the Fourth Proportional to 479,190.83, 661,495.88 and 309,507.71

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Solution

The fourth proportional to 479,190.83, 661,495.88 and 309,507.71 is: 427,257.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,190.83 : 661,495.88 = 309,507.71 : x
  2. Step 2: Convert to fraction form
    479,190.83/661,495.88 = 309,507.71/x
  3. Step 3: Cross multiply
    479,190.83x = 661,495.88 × 309,507.71
  4. Step 4: Simplify right side
    479,190.83x = 204,738,072,459.53
  5. Step 5: Solve for x
    x = 204,738,072,459.53/479,190.83
  6. Step 6: Final answer
    x = 427,257.91

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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.