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Finding the Fourth Proportional to 645,385.92, 967,782.72 and 379,271.68

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Solution

The fourth proportional to 645,385.92, 967,782.72 and 379,271.68 is: 568,733.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,385.92 : 967,782.72 = 379,271.68 : x
  2. Step 2: Convert to fraction form
    645,385.92/967,782.72 = 379,271.68/x
  3. Step 3: Cross multiply
    645,385.92x = 967,782.72 × 379,271.68
  4. Step 4: Simplify right side
    645,385.92x = 367,052,578,089.37
  5. Step 5: Solve for x
    x = 367,052,578,089.37/645,385.92
  6. Step 6: Final answer
    x = 568,733.48

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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.