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Finding the Fourth Proportional to 345,059.82, 476,204.30 and 209,105.66

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Solution

The fourth proportional to 345,059.82, 476,204.30 and 209,105.66 is: 288,578.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,059.82 : 476,204.30 = 209,105.66 : x
  2. Step 2: Convert to fraction form
    345,059.82/476,204.30 = 209,105.66/x
  3. Step 3: Cross multiply
    345,059.82x = 476,204.30 × 209,105.66
  4. Step 4: Simplify right side
    345,059.82x = 99,577,014,446.34
  5. Step 5: Solve for x
    x = 99,577,014,446.34/345,059.82
  6. Step 6: Final answer
    x = 288,578.99

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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.