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Finding the Fourth Proportional to 358,831.80, 538,320.60 and 122,198.40

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Solution

The fourth proportional to 358,831.80, 538,320.60 and 122,198.40 is: 183,322.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,831.80 : 538,320.60 = 122,198.40 : x
  2. Step 2: Convert to fraction form
    358,831.80/538,320.60 = 122,198.40/x
  3. Step 3: Cross multiply
    358,831.80x = 538,320.60 × 122,198.40
  4. Step 4: Simplify right side
    358,831.80x = 65,781,916,007.04
  5. Step 5: Solve for x
    x = 65,781,916,007.04/358,831.80
  6. Step 6: Final answer
    x = 183,322.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.