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Finding the Fourth Proportional to 366,619.01, 505,404.08 and 257,390.81

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Solution

The fourth proportional to 366,619.01, 505,404.08 and 257,390.81 is: 354,827.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    366,619.01 : 505,404.08 = 257,390.81 : x
  2. Step 2: Convert to fraction form
    366,619.01/505,404.08 = 257,390.81/x
  3. Step 3: Cross multiply
    366,619.01x = 505,404.08 × 257,390.81
  4. Step 4: Simplify right side
    366,619.01x = 130,086,368,141.82
  5. Step 5: Solve for x
    x = 130,086,368,141.82/366,619.01
  6. Step 6: Final answer
    x = 354,827.12

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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.