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Finding the Fourth Proportional to 1,124.02, 1,549.54 and 791.41

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Solution

The fourth proportional to 1,124.02, 1,549.54 and 791.41 is: 1,091.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.02 : 1,549.54 = 791.41 : x
  2. Step 2: Convert to fraction form
    1,124.02/1,549.54 = 791.41/x
  3. Step 3: Cross multiply
    1,124.02x = 1,549.54 × 791.41
  4. Step 4: Simplify right side
    1,124.02x = 1,226,321.45
  5. Step 5: Solve for x
    x = 1,226,321.45/1,124.02
  6. Step 6: Final answer
    x = 1,091.01

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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.