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Finding the Fourth Proportional to 348,999.38, 523,493.31 and 86,343.38

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Solution

The fourth proportional to 348,999.38, 523,493.31 and 86,343.38 is: 129,513.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,999.38 : 523,493.31 = 86,343.38 : x
  2. Step 2: Convert to fraction form
    348,999.38/523,493.31 = 86,343.38/x
  3. Step 3: Cross multiply
    348,999.38x = 523,493.31 × 86,343.38
  4. Step 4: Simplify right side
    348,999.38x = 45,200,181,792.79
  5. Step 5: Solve for x
    x = 45,200,181,792.79/348,999.38
  6. Step 6: Final answer
    x = 129,513.64

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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.