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Finding the Fourth Proportional to 618,186.20, 926,588.10 and 263,139.80

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Solution

The fourth proportional to 618,186.20, 926,588.10 and 263,139.80 is: 394,415.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,186.20 : 926,588.10 = 263,139.80 : x
  2. Step 2: Convert to fraction form
    618,186.20/926,588.10 = 263,139.80/x
  3. Step 3: Cross multiply
    618,186.20x = 926,588.10 × 263,139.80
  4. Step 4: Simplify right side
    618,186.20x = 243,822,207,316.38
  5. Step 5: Solve for x
    x = 243,822,207,316.38/618,186.20
  6. Step 6: Final answer
    x = 394,415.48

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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.