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Finding the Fourth Proportional to 388,901.75, 536,684.78 and 210,053.75

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Solution

The fourth proportional to 388,901.75, 536,684.78 and 210,053.75 is: 289,874.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,901.75 : 536,684.78 = 210,053.75 : x
  2. Step 2: Convert to fraction form
    388,901.75/536,684.78 = 210,053.75/x
  3. Step 3: Cross multiply
    388,901.75x = 536,684.78 × 210,053.75
  4. Step 4: Simplify right side
    388,901.75x = 112,732,649,556.66
  5. Step 5: Solve for x
    x = 112,732,649,556.66/388,901.75
  6. Step 6: Final answer
    x = 289,874.37

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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.