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Finding the Fourth Proportional to 660,067.14, 910,861.16 and 405,369.12

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Solution

The fourth proportional to 660,067.14, 910,861.16 and 405,369.12 is: 559,390.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,067.14 : 910,861.16 = 405,369.12 : x
  2. Step 2: Convert to fraction form
    660,067.14/910,861.16 = 405,369.12/x
  3. Step 3: Cross multiply
    660,067.14x = 910,861.16 × 405,369.12
  4. Step 4: Simplify right side
    660,067.14x = 369,234,988,260.26
  5. Step 5: Solve for x
    x = 369,234,988,260.26/660,067.14
  6. Step 6: Final answer
    x = 559,390.04

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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.