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Finding the Fourth Proportional to 388,855.20, 582,116.40 and 365,786.40

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Solution

The fourth proportional to 388,855.20, 582,116.40 and 365,786.40 is: 547,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,855.20 : 582,116.40 = 365,786.40 : x
  2. Step 2: Convert to fraction form
    388,855.20/582,116.40 = 365,786.40/x
  3. Step 3: Cross multiply
    388,855.20x = 582,116.40 × 365,786.40
  4. Step 4: Simplify right side
    388,855.20x = 212,930,262,336.96
  5. Step 5: Solve for x
    x = 212,930,262,336.96/388,855.20
  6. Step 6: Final answer
    x = 547,582.40

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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.