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Finding the Fourth Proportional to 499,114.39, 748,797.89 and 139,285.21

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Solution

The fourth proportional to 499,114.39, 748,797.89 and 139,285.21 is: 208,963.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,114.39 : 748,797.89 = 139,285.21 : x
  2. Step 2: Convert to fraction form
    499,114.39/748,797.89 = 139,285.21/x
  3. Step 3: Cross multiply
    499,114.39x = 748,797.89 × 139,285.21
  4. Step 4: Simplify right side
    499,114.39x = 104,296,469,432.59
  5. Step 5: Solve for x
    x = 104,296,469,432.59/499,114.39
  6. Step 6: Final answer
    x = 208,963.06

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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.