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Finding the Fourth Proportional to 291,686.58, 439,105.80 and 262,358.16

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Solution

The fourth proportional to 291,686.58, 439,105.80 and 262,358.16 is: 394,954.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,686.58 : 439,105.80 = 262,358.16 : x
  2. Step 2: Convert to fraction form
    291,686.58/439,105.80 = 262,358.16/x
  3. Step 3: Cross multiply
    291,686.58x = 439,105.80 × 262,358.16
  4. Step 4: Simplify right side
    291,686.58x = 115,202,989,733.33
  5. Step 5: Solve for x
    x = 115,202,989,733.33/291,686.58
  6. Step 6: Final answer
    x = 394,954.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.