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Finding the Fourth Proportional to 715,850.64, 987,874.52 and 393,566.22

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Solution

The fourth proportional to 715,850.64, 987,874.52 and 393,566.22 is: 543,121.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,850.64 : 987,874.52 = 393,566.22 : x
  2. Step 2: Convert to fraction form
    715,850.64/987,874.52 = 393,566.22/x
  3. Step 3: Cross multiply
    715,850.64x = 987,874.52 × 393,566.22
  4. Step 4: Simplify right side
    715,850.64x = 388,794,038,702.88
  5. Step 5: Solve for x
    x = 388,794,038,702.88/715,850.64
  6. Step 6: Final answer
    x = 543,121.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.