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Finding the Fourth Proportional to 384,115.20, 576,172.80 and 356,121.60

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Solution

The fourth proportional to 384,115.20, 576,172.80 and 356,121.60 is: 534,182.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,115.20 : 576,172.80 = 356,121.60 : x
  2. Step 2: Convert to fraction form
    384,115.20/576,172.80 = 356,121.60/x
  3. Step 3: Cross multiply
    384,115.20x = 576,172.80 × 356,121.60
  4. Step 4: Simplify right side
    384,115.20x = 205,187,579,412.48
  5. Step 5: Solve for x
    x = 205,187,579,412.48/384,115.20
  6. Step 6: Final answer
    x = 534,182.40

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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.