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Finding the Fourth Proportional to 388,957, 536,761.14 and 210,109

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Solution

The fourth proportional to 388,957, 536,761.14 and 210,109 is: 289,950.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,957 : 536,761.14 = 210,109 : x
  2. Step 2: Convert to fraction form
    388,957/536,761.14 = 210,109/x
  3. Step 3: Cross multiply
    388,957x = 536,761.14 × 210,109
  4. Step 4: Simplify right side
    388,957x = 112,778,346,364.26
  5. Step 5: Solve for x
    x = 112,778,346,364.26/388,957
  6. Step 6: Final answer
    x = 289,950.68

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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.