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Finding the Fourth Proportional to 1,236,576.42, 1,705,623.75 and 869,831.64

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Solution

The fourth proportional to 1,236,576.42, 1,705,623.75 and 869,831.64 is: 1,199,768.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236,576.42 : 1,705,623.75 = 869,831.64 : x
  2. Step 2: Convert to fraction form
    1,236,576.42/1,705,623.75 = 869,831.64/x
  3. Step 3: Cross multiply
    1,236,576.42x = 1,705,623.75 × 869,831.64
  4. Step 4: Simplify right side
    1,236,576.42x = 1,483,605,503,685.45
  5. Step 5: Solve for x
    x = 1,483,605,503,685.45/1,236,576.42
  6. Step 6: Final answer
    x = 1,199,768.55

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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.