Home / 1,278.06-1,762.80-1,173.48

Finding the Fourth Proportional to 1,278.06, 1,762.80 and 1,173.48

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Solution

The fourth proportional to 1,278.06, 1,762.80 and 1,173.48 is: 1,618.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.06 : 1,762.80 = 1,173.48 : x
  2. Step 2: Convert to fraction form
    1,278.06/1,762.80 = 1,173.48/x
  3. Step 3: Cross multiply
    1,278.06x = 1,762.80 × 1,173.48
  4. Step 4: Simplify right side
    1,278.06x = 2,068,610.54
  5. Step 5: Solve for x
    x = 2,068,610.54/1,278.06
  6. Step 6: Final answer
    x = 1,618.56

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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.