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Finding the Fourth Proportional to 715,796.34, 987,817.76 and 393,514.54

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Solution

The fourth proportional to 715,796.34, 987,817.76 and 393,514.54 is: 543,060.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,796.34 : 987,817.76 = 393,514.54 : x
  2. Step 2: Convert to fraction form
    715,796.34/987,817.76 = 393,514.54/x
  3. Step 3: Cross multiply
    715,796.34x = 987,817.76 × 393,514.54
  4. Step 4: Simplify right side
    715,796.34x = 388,720,651,430.23
  5. Step 5: Solve for x
    x = 388,720,651,430.23/715,796.34
  6. Step 6: Final answer
    x = 543,060.41

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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.