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Finding the Fourth Proportional to 1,202.88, 1,800.64 and 791.20

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Solution

The fourth proportional to 1,202.88, 1,800.64 and 791.20 is: 1,184.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.88 : 1,800.64 = 791.20 : x
  2. Step 2: Convert to fraction form
    1,202.88/1,800.64 = 791.20/x
  3. Step 3: Cross multiply
    1,202.88x = 1,800.64 × 791.20
  4. Step 4: Simplify right side
    1,202.88x = 1,424,666.37
  5. Step 5: Solve for x
    x = 1,424,666.37/1,202.88
  6. Step 6: Final answer
    x = 1,184.38

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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.