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Finding the Fourth Proportional to 353,553.45, 487,818.41 and 208,365.20

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Solution

The fourth proportional to 353,553.45, 487,818.41 and 208,365.20 is: 287,493.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,553.45 : 487,818.41 = 208,365.20 : x
  2. Step 2: Convert to fraction form
    353,553.45/487,818.41 = 208,365.20/x
  3. Step 3: Cross multiply
    353,553.45x = 487,818.41 × 208,365.20
  4. Step 4: Simplify right side
    353,553.45x = 101,644,380,563.33
  5. Step 5: Solve for x
    x = 101,644,380,563.33/353,553.45
  6. Step 6: Final answer
    x = 287,493.67

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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.