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Finding the Fourth Proportional to 715,959.36, 988,027.60 and 393,690.32

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Solution

The fourth proportional to 715,959.36, 988,027.60 and 393,690.32 is: 543,294.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,959.36 : 988,027.60 = 393,690.32 : x
  2. Step 2: Convert to fraction form
    715,959.36/988,027.60 = 393,690.32/x
  3. Step 3: Cross multiply
    715,959.36x = 988,027.60 × 393,690.32
  4. Step 4: Simplify right side
    715,959.36x = 388,976,902,012.83
  5. Step 5: Solve for x
    x = 388,976,902,012.83/715,959.36
  6. Step 6: Final answer
    x = 543,294.67

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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.