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Finding the Fourth Proportional to 455,540.82, 628,618.74 and 274,311.42

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Solution

The fourth proportional to 455,540.82, 628,618.74 and 274,311.42 is: 378,533.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,540.82 : 628,618.74 = 274,311.42 : x
  2. Step 2: Convert to fraction form
    455,540.82/628,618.74 = 274,311.42/x
  3. Step 3: Cross multiply
    455,540.82x = 628,618.74 × 274,311.42
  4. Step 4: Simplify right side
    455,540.82x = 172,437,299,208.01
  5. Step 5: Solve for x
    x = 172,437,299,208.01/455,540.82
  6. Step 6: Final answer
    x = 378,533.14

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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.