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Finding the Fourth Proportional to 715,852.14, 987,876.59 and 393,567.72

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Solution

The fourth proportional to 715,852.14, 987,876.59 and 393,567.72 is: 543,123.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,852.14 : 987,876.59 = 393,567.72 : x
  2. Step 2: Convert to fraction form
    715,852.14/987,876.59 = 393,567.72/x
  3. Step 3: Cross multiply
    715,852.14x = 987,876.59 × 393,567.72
  4. Step 4: Simplify right side
    715,852.14x = 388,796,335,199.84
  5. Step 5: Solve for x
    x = 388,796,335,199.84/715,852.14
  6. Step 6: Final answer
    x = 543,123.80

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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.