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Finding the Fourth Proportional to 1,239.84, 1,845.72 and 1,222.56

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Solution

The fourth proportional to 1,239.84, 1,845.72 and 1,222.56 is: 1,820.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.84 : 1,845.72 = 1,222.56 : x
  2. Step 2: Convert to fraction form
    1,239.84/1,845.72 = 1,222.56/x
  3. Step 3: Cross multiply
    1,239.84x = 1,845.72 × 1,222.56
  4. Step 4: Simplify right side
    1,239.84x = 2,256,503.44
  5. Step 5: Solve for x
    x = 2,256,503.44/1,239.84
  6. Step 6: Final answer
    x = 1,820.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.