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Finding the Fourth Proportional to 1,225.54, 1,692.43 and 1,047.45

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Solution

The fourth proportional to 1,225.54, 1,692.43 and 1,047.45 is: 1,446.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.54 : 1,692.43 = 1,047.45 : x
  2. Step 2: Convert to fraction form
    1,225.54/1,692.43 = 1,047.45/x
  3. Step 3: Cross multiply
    1,225.54x = 1,692.43 × 1,047.45
  4. Step 4: Simplify right side
    1,225.54x = 1,772,735.80
  5. Step 5: Solve for x
    x = 1,772,735.80/1,225.54
  6. Step 6: Final answer
    x = 1,446.49

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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.