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Finding the Fourth Proportional to 388,867, 536,636.46 and 210,019

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Solution

The fourth proportional to 388,867, 536,636.46 and 210,019 is: 289,826.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,867 : 536,636.46 = 210,019 : x
  2. Step 2: Convert to fraction form
    388,867/536,636.46 = 210,019/x
  3. Step 3: Cross multiply
    388,867x = 536,636.46 × 210,019
  4. Step 4: Simplify right side
    388,867x = 112,703,852,692.74
  5. Step 5: Solve for x
    x = 112,703,852,692.74/388,867
  6. Step 6: Final answer
    x = 289,826.22

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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.