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Finding the Fourth Proportional to 353,611.45, 487,994.39 and 217,723.80

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Solution

The fourth proportional to 353,611.45, 487,994.39 and 217,723.80 is: 300,465.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,611.45 : 487,994.39 = 217,723.80 : x
  2. Step 2: Convert to fraction form
    353,611.45/487,994.39 = 217,723.80/x
  3. Step 3: Cross multiply
    353,611.45x = 487,994.39 × 217,723.80
  4. Step 4: Simplify right side
    353,611.45x = 106,247,992,969.48
  5. Step 5: Solve for x
    x = 106,247,992,969.48/353,611.45
  6. Step 6: Final answer
    x = 300,465.36

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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.