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Finding the Fourth Proportional to 361,431.42, 498,611.80 and 218,145.66

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Solution

The fourth proportional to 361,431.42, 498,611.80 and 218,145.66 is: 300,942.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,431.42 : 498,611.80 = 218,145.66 : x
  2. Step 2: Convert to fraction form
    361,431.42/498,611.80 = 218,145.66/x
  3. Step 3: Cross multiply
    361,431.42x = 498,611.80 × 218,145.66
  4. Step 4: Simplify right side
    361,431.42x = 108,769,997,156.37
  5. Step 5: Solve for x
    x = 108,769,997,156.37/361,431.42
  6. Step 6: Final answer
    x = 300,942.29

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1.5x scale

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.