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Finding the Fourth Proportional to 347,112, 479,014.88 and 188,136

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Solution

The fourth proportional to 347,112, 479,014.88 and 188,136 is: 259,627.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,112 : 479,014.88 = 188,136 : x
  2. Step 2: Convert to fraction form
    347,112/479,014.88 = 188,136/x
  3. Step 3: Cross multiply
    347,112x = 479,014.88 × 188,136
  4. Step 4: Simplify right side
    347,112x = 90,119,943,463.68
  5. Step 5: Solve for x
    x = 90,119,943,463.68/347,112
  6. Step 6: Final answer
    x = 259,627.85

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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.