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Finding the Fourth Proportional to 494,956.20, 742,351.74 and 139,889.64

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Solution

The fourth proportional to 494,956.20, 742,351.74 and 139,889.64 is: 209,811.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,956.20 : 742,351.74 = 139,889.64 : x
  2. Step 2: Convert to fraction form
    494,956.20/742,351.74 = 139,889.64/x
  3. Step 3: Cross multiply
    494,956.20x = 742,351.74 × 139,889.64
  4. Step 4: Simplify right side
    494,956.20x = 103,847,317,661.97
  5. Step 5: Solve for x
    x = 103,847,317,661.97/494,956.20
  6. Step 6: Final answer
    x = 209,811.13

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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.