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Finding the Fourth Proportional to 274,458.36, 378,985.02 and 172,516.64

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Solution

The fourth proportional to 274,458.36, 378,985.02 and 172,516.64 is: 238,219.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,458.36 : 378,985.02 = 172,516.64 : x
  2. Step 2: Convert to fraction form
    274,458.36/378,985.02 = 172,516.64/x
  3. Step 3: Cross multiply
    274,458.36x = 378,985.02 × 172,516.64
  4. Step 4: Simplify right side
    274,458.36x = 65,381,222,260.73
  5. Step 5: Solve for x
    x = 65,381,222,260.73/274,458.36
  6. Step 6: Final answer
    x = 238,219.10

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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.