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Finding the Fourth Proportional to 388,956, 536,759.76 and 210,108

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Solution

The fourth proportional to 388,956, 536,759.76 and 210,108 is: 289,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,956 : 536,759.76 = 210,108 : x
  2. Step 2: Convert to fraction form
    388,956/536,759.76 = 210,108/x
  3. Step 3: Cross multiply
    388,956x = 536,759.76 × 210,108
  4. Step 4: Simplify right side
    388,956x = 112,777,519,654.08
  5. Step 5: Solve for x
    x = 112,777,519,654.08/388,956
  6. Step 6: Final answer
    x = 289,949.30

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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.