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Finding the Fourth Proportional to 519,411.80, 779,190.60 and 164,388.80

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Solution

The fourth proportional to 519,411.80, 779,190.60 and 164,388.80 is: 246,606.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,411.80 : 779,190.60 = 164,388.80 : x
  2. Step 2: Convert to fraction form
    519,411.80/779,190.60 = 164,388.80/x
  3. Step 3: Cross multiply
    519,411.80x = 779,190.60 × 164,388.80
  4. Step 4: Simplify right side
    519,411.80x = 128,090,207,705.28
  5. Step 5: Solve for x
    x = 128,090,207,705.28/519,411.80
  6. Step 6: Final answer
    x = 246,606.27

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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.