Home / 1,278.27-1,762.63-1,111.01

Finding the Fourth Proportional to 1,278.27, 1,762.63 and 1,111.01

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Solution

The fourth proportional to 1,278.27, 1,762.63 and 1,111.01 is: 1,531.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.27 : 1,762.63 = 1,111.01 : x
  2. Step 2: Convert to fraction form
    1,278.27/1,762.63 = 1,111.01/x
  3. Step 3: Cross multiply
    1,278.27x = 1,762.63 × 1,111.01
  4. Step 4: Simplify right side
    1,278.27x = 1,958,287.97
  5. Step 5: Solve for x
    x = 1,958,287.97/1,278.27
  6. Step 6: Final answer
    x = 1,531.98

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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.