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Finding the Fourth Proportional to 494,885.70, 742,255.65 and 139,935.60

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Solution

The fourth proportional to 494,885.70, 742,255.65 and 139,935.60 is: 209,882.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,885.70 : 742,255.65 = 139,935.60 : x
  2. Step 2: Convert to fraction form
    494,885.70/742,255.65 = 139,935.60/x
  3. Step 3: Cross multiply
    494,885.70x = 742,255.65 × 139,935.60
  4. Step 4: Simplify right side
    494,885.70x = 103,867,989,736.14
  5. Step 5: Solve for x
    x = 103,867,989,736.14/494,885.70
  6. Step 6: Final answer
    x = 209,882.79

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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.