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Finding the Fourth Proportional to 352,603,396.80, 528,905,095.20 and 255,857,515.20

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Solution

The fourth proportional to 352,603,396.80, 528,905,095.20 and 255,857,515.20 is: 383,786,272.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,603,396.80 : 528,905,095.20 = 255,857,515.20 : x
  2. Step 2: Convert to fraction form
    352,603,396.80/528,905,095.20 = 255,857,515.20/x
  3. Step 3: Cross multiply
    352,603,396.80x = 528,905,095.20 × 255,857,515.20
  4. Step 4: Simplify right side
    352,603,396.80x = 135,324,343,434,491,440
  5. Step 5: Solve for x
    x = 135,324,343,434,491,440/352,603,396.80
  6. Step 6: Final answer
    x = 383,786,272.80

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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.