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Finding the Fourth Proportional to 388,912.60, 536,699.28 and 210,064.60

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Solution

The fourth proportional to 388,912.60, 536,699.28 and 210,064.60 is: 289,889.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,912.60 : 536,699.28 = 210,064.60 : x
  2. Step 2: Convert to fraction form
    388,912.60/536,699.28 = 210,064.60/x
  3. Step 3: Cross multiply
    388,912.60x = 536,699.28 × 210,064.60
  4. Step 4: Simplify right side
    388,912.60x = 112,741,519,573.49
  5. Step 5: Solve for x
    x = 112,741,519,573.49/388,912.60
  6. Step 6: Final answer
    x = 289,889.09

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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.