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Finding the Fourth Proportional to 389,065.50, 536,910.39 and 210,217.50

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Solution

The fourth proportional to 389,065.50, 536,910.39 and 210,217.50 is: 290,100.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,065.50 : 536,910.39 = 210,217.50 : x
  2. Step 2: Convert to fraction form
    389,065.50/536,910.39 = 210,217.50/x
  3. Step 3: Cross multiply
    389,065.50x = 536,910.39 × 210,217.50
  4. Step 4: Simplify right side
    389,065.50x = 112,867,959,909.83
  5. Step 5: Solve for x
    x = 112,867,959,909.83/389,065.50
  6. Step 6: Final answer
    x = 290,100.15

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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.