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Finding the Fourth Proportional to 1,222.34, 1,831.60 and 945.38

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Solution

The fourth proportional to 1,222.34, 1,831.60 and 945.38 is: 1,416.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.34 : 1,831.60 = 945.38 : x
  2. Step 2: Convert to fraction form
    1,222.34/1,831.60 = 945.38/x
  3. Step 3: Cross multiply
    1,222.34x = 1,831.60 × 945.38
  4. Step 4: Simplify right side
    1,222.34x = 1,731,546.49
  5. Step 5: Solve for x
    x = 1,731,546.49/1,222.34
  6. Step 6: Final answer
    x = 1,416.58

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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.