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Finding the Fourth Proportional to 666,485, 919,749.30 and 364,679

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Solution

The fourth proportional to 666,485, 919,749.30 and 364,679 is: 503,257.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,485 : 919,749.30 = 364,679 : x
  2. Step 2: Convert to fraction form
    666,485/919,749.30 = 364,679/x
  3. Step 3: Cross multiply
    666,485x = 919,749.30 × 364,679
  4. Step 4: Simplify right side
    666,485x = 335,413,254,974.70
  5. Step 5: Solve for x
    x = 335,413,254,974.70/666,485
  6. Step 6: Final answer
    x = 503,257.02

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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.