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Finding the Fourth Proportional to 665,717, 918,692.74 and 363,911

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Solution

The fourth proportional to 665,717, 918,692.74 and 363,911 is: 502,198.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,717 : 918,692.74 = 363,911 : x
  2. Step 2: Convert to fraction form
    665,717/918,692.74 = 363,911/x
  3. Step 3: Cross multiply
    665,717x = 918,692.74 × 363,911
  4. Step 4: Simplify right side
    665,717x = 334,322,393,706.14
  5. Step 5: Solve for x
    x = 334,322,393,706.14/665,717
  6. Step 6: Final answer
    x = 502,198.97

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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.