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Finding the Fourth Proportional to 519,989, 779,884.86 and 253,481.48

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Solution

The fourth proportional to 519,989, 779,884.86 and 253,481.48 is: 380,174.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,989 : 779,884.86 = 253,481.48 : x
  2. Step 2: Convert to fraction form
    519,989/779,884.86 = 253,481.48/x
  3. Step 3: Cross multiply
    519,989x = 779,884.86 × 253,481.48
  4. Step 4: Simplify right side
    519,989x = 197,686,368,542.39
  5. Step 5: Solve for x
    x = 197,686,368,542.39/519,989
  6. Step 6: Final answer
    x = 380,174.14

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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.