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Finding the Fourth Proportional to 345,380.41, 476,493.96 and 209,364.76

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Solution

The fourth proportional to 345,380.41, 476,493.96 and 209,364.76 is: 288,843.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,380.41 : 476,493.96 = 209,364.76 : x
  2. Step 2: Convert to fraction form
    345,380.41/476,493.96 = 209,364.76/x
  3. Step 3: Cross multiply
    345,380.41x = 476,493.96 × 209,364.76
  4. Step 4: Simplify right side
    345,380.41x = 99,761,043,576.85
  5. Step 5: Solve for x
    x = 99,761,043,576.85/345,380.41
  6. Step 6: Final answer
    x = 288,843.95

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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.