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Finding the Fourth Proportional to 388,672.20, 583,883.10 and 378,174.60

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Solution

The fourth proportional to 388,672.20, 583,883.10 and 378,174.60 is: 568,113.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,672.20 : 583,883.10 = 378,174.60 : x
  2. Step 2: Convert to fraction form
    388,672.20/583,883.10 = 378,174.60/x
  3. Step 3: Cross multiply
    388,672.20x = 583,883.10 × 378,174.60
  4. Step 4: Simplify right side
    388,672.20x = 220,809,757,789.26
  5. Step 5: Solve for x
    x = 220,809,757,789.26/388,672.20
  6. Step 6: Final answer
    x = 568,113.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.