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Finding the Fourth Proportional to 261,611.82, 361,036.26 and 154,186.38

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Solution

The fourth proportional to 261,611.82, 361,036.26 and 154,186.38 is: 212,784.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,611.82 : 361,036.26 = 154,186.38 : x
  2. Step 2: Convert to fraction form
    261,611.82/361,036.26 = 154,186.38/x
  3. Step 3: Cross multiply
    261,611.82x = 361,036.26 × 154,186.38
  4. Step 4: Simplify right side
    261,611.82x = 55,666,873,978.14
  5. Step 5: Solve for x
    x = 55,666,873,978.14/261,611.82
  6. Step 6: Final answer
    x = 212,784.25

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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.