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Finding the Fourth Proportional to 351,813.88, 485,490.16 and 190,665.47

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Solution

The fourth proportional to 351,813.88, 485,490.16 and 190,665.47 is: 263,111.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,813.88 : 485,490.16 = 190,665.47 : x
  2. Step 2: Convert to fraction form
    351,813.88/485,490.16 = 190,665.47/x
  3. Step 3: Cross multiply
    351,813.88x = 485,490.16 × 190,665.47
  4. Step 4: Simplify right side
    351,813.88x = 92,566,208,550.90
  5. Step 5: Solve for x
    x = 92,566,208,550.90/351,813.88
  6. Step 6: Final answer
    x = 263,111.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.