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Finding the Fourth Proportional to 386,043.20, 579,583.20 and 246,420.80

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Solution

The fourth proportional to 386,043.20, 579,583.20 and 246,420.80 is: 369,962.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,043.20 : 579,583.20 = 246,420.80 : x
  2. Step 2: Convert to fraction form
    386,043.20/579,583.20 = 246,420.80/x
  3. Step 3: Cross multiply
    386,043.20x = 579,583.20 × 246,420.80
  4. Step 4: Simplify right side
    386,043.20x = 142,821,355,810.56
  5. Step 5: Solve for x
    x = 142,821,355,810.56/386,043.20
  6. Step 6: Final answer
    x = 369,962.11

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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.