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Finding the Fourth Proportional to 455,138.73, 679,247.29 and 404,694.66

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Solution

The fourth proportional to 455,138.73, 679,247.29 and 404,694.66 is: 603,964.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,138.73 : 679,247.29 = 404,694.66 : x
  2. Step 2: Convert to fraction form
    455,138.73/679,247.29 = 404,694.66/x
  3. Step 3: Cross multiply
    455,138.73x = 679,247.29 × 404,694.66
  4. Step 4: Simplify right side
    455,138.73x = 274,887,751,082.47
  5. Step 5: Solve for x
    x = 274,887,751,082.47/455,138.73
  6. Step 6: Final answer
    x = 603,964.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.