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Finding the Fourth Proportional to 472,392,803.70, 708,589,205.55 and 455,174,115.30

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Solution

The fourth proportional to 472,392,803.70, 708,589,205.55 and 455,174,115.30 is: 682,761,172.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,392,803.70 : 708,589,205.55 = 455,174,115.30 : x
  2. Step 2: Convert to fraction form
    472,392,803.70/708,589,205.55 = 455,174,115.30/x
  3. Step 3: Cross multiply
    472,392,803.70x = 708,589,205.55 × 455,174,115.30
  4. Step 4: Simplify right side
    472,392,803.70x = 322,531,464,747,351,104
  5. Step 5: Solve for x
    x = 322,531,464,747,351,104/472,392,803.70
  6. Step 6: Final answer
    x = 682,761,172.95

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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.