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Finding the Fourth Proportional to 274,244.72, 378,458.60 and 153,388.08

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Solution

The fourth proportional to 274,244.72, 378,458.60 and 153,388.08 is: 211,676.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,244.72 : 378,458.60 = 153,388.08 : x
  2. Step 2: Convert to fraction form
    274,244.72/378,458.60 = 153,388.08/x
  3. Step 3: Cross multiply
    274,244.72x = 378,458.60 × 153,388.08
  4. Step 4: Simplify right side
    274,244.72x = 58,051,038,013.49
  5. Step 5: Solve for x
    x = 58,051,038,013.49/274,244.72
  6. Step 6: Final answer
    x = 211,676.05

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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.