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Finding the Fourth Proportional to 1,361,945.61, 1,879,035.06 and 878,831.84

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Solution

The fourth proportional to 1,361,945.61, 1,879,035.06 and 878,831.84 is: 1,212,497.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361,945.61 : 1,879,035.06 = 878,831.84 : x
  2. Step 2: Convert to fraction form
    1,361,945.61/1,879,035.06 = 878,831.84/x
  3. Step 3: Cross multiply
    1,361,945.61x = 1,879,035.06 × 878,831.84
  4. Step 4: Simplify right side
    1,361,945.61x = 1,651,355,847,197.52
  5. Step 5: Solve for x
    x = 1,651,355,847,197.52/1,361,945.61
  6. Step 6: Final answer
    x = 1,212,497.65

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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.