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Finding the Fourth Proportional to 715,841.89, 987,852.92 and 393,549.17

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Solution

The fourth proportional to 715,841.89, 987,852.92 and 393,549.17 is: 543,092.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,841.89 : 987,852.92 = 393,549.17 : x
  2. Step 2: Convert to fraction form
    715,841.89/987,852.92 = 393,549.17/x
  3. Step 3: Cross multiply
    715,841.89x = 987,852.92 × 393,549.17
  4. Step 4: Simplify right side
    715,841.89x = 388,768,689,841.07
  5. Step 5: Solve for x
    x = 388,768,689,841.07/715,841.89
  6. Step 6: Final answer
    x = 543,092.96

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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.