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Finding the Fourth Proportional to 355,647.72, 490,972.26 and 274,892.88

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Solution

The fourth proportional to 355,647.72, 490,972.26 and 274,892.88 is: 379,490.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,647.72 : 490,972.26 = 274,892.88 : x
  2. Step 2: Convert to fraction form
    355,647.72/490,972.26 = 274,892.88/x
  3. Step 3: Cross multiply
    355,647.72x = 490,972.26 × 274,892.88
  4. Step 4: Simplify right side
    355,647.72x = 134,964,778,551.51
  5. Step 5: Solve for x
    x = 134,964,778,551.51/355,647.72
  6. Step 6: Final answer
    x = 379,490.07

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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.