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Finding the Fourth Proportional to 303,831.54, 455,615.82 and 126,216.90

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Solution

The fourth proportional to 303,831.54, 455,615.82 and 126,216.90 is: 189,270.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,831.54 : 455,615.82 = 126,216.90 : x
  2. Step 2: Convert to fraction form
    303,831.54/455,615.82 = 126,216.90/x
  3. Step 3: Cross multiply
    303,831.54x = 455,615.82 × 126,216.90
  4. Step 4: Simplify right side
    303,831.54x = 57,506,416,391.36
  5. Step 5: Solve for x
    x = 57,506,416,391.36/303,831.54
  6. Step 6: Final answer
    x = 189,270.73

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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.