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Finding the Fourth Proportional to 388,040,347.20, 582,060,520.80 and 265,596,340.80

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Solution

The fourth proportional to 388,040,347.20, 582,060,520.80 and 265,596,340.80 is: 398,394,511.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,040,347.20 : 582,060,520.80 = 265,596,340.80 : x
  2. Step 2: Convert to fraction form
    388,040,347.20/582,060,520.80 = 265,596,340.80/x
  3. Step 3: Cross multiply
    388,040,347.20x = 582,060,520.80 × 265,596,340.80
  4. Step 4: Simplify right side
    388,040,347.20x = 154,593,144,448,622,272
  5. Step 5: Solve for x
    x = 154,593,144,448,622,272/388,040,347.20
  6. Step 6: Final answer
    x = 398,394,511.20

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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.