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Finding the Fourth Proportional to 1,375,831.78, 1,898,584.39 and 764,023.62

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Solution

The fourth proportional to 1,375,831.78, 1,898,584.39 and 764,023.62 is: 1,054,317.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,831.78 : 1,898,584.39 = 764,023.62 : x
  2. Step 2: Convert to fraction form
    1,375,831.78/1,898,584.39 = 764,023.62/x
  3. Step 3: Cross multiply
    1,375,831.78x = 1,898,584.39 × 764,023.62
  4. Step 4: Simplify right side
    1,375,831.78x = 1,450,563,318,523.29
  5. Step 5: Solve for x
    x = 1,450,563,318,523.29/1,375,831.78
  6. Step 6: Final answer
    x = 1,054,317.35

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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.