Home / 865,138.90-1,297,805.55-266,095.30

Finding the Fourth Proportional to 865,138.90, 1,297,805.55 and 266,095.30

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Solution

The fourth proportional to 865,138.90, 1,297,805.55 and 266,095.30 is: 399,172.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,138.90 : 1,297,805.55 = 266,095.30 : x
  2. Step 2: Convert to fraction form
    865,138.90/1,297,805.55 = 266,095.30/x
  3. Step 3: Cross multiply
    865,138.90x = 1,297,805.55 × 266,095.30
  4. Step 4: Simplify right side
    865,138.90x = 345,339,957,168.92
  5. Step 5: Solve for x
    x = 345,339,957,168.92/865,138.90
  6. Step 6: Final answer
    x = 399,172.85

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1.5x scale

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.