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Finding the Fourth Proportional to 1,180.54, 1,762.91 and 1,112.20

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Solution

The fourth proportional to 1,180.54, 1,762.91 and 1,112.20 is: 1,660.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.54 : 1,762.91 = 1,112.20 : x
  2. Step 2: Convert to fraction form
    1,180.54/1,762.91 = 1,112.20/x
  3. Step 3: Cross multiply
    1,180.54x = 1,762.91 × 1,112.20
  4. Step 4: Simplify right side
    1,180.54x = 1,960,708.50
  5. Step 5: Solve for x
    x = 1,960,708.50/1,180.54
  6. Step 6: Final answer
    x = 1,660.86

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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.