Home / 2,927.80-4,040.12-1,668.78

Finding the Fourth Proportional to 2,927.80, 4,040.12 and 1,668.78

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Solution

The fourth proportional to 2,927.80, 4,040.12 and 1,668.78 is: 2,302.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,927.80 : 4,040.12 = 1,668.78 : x
  2. Step 2: Convert to fraction form
    2,927.80/4,040.12 = 1,668.78/x
  3. Step 3: Cross multiply
    2,927.80x = 4,040.12 × 1,668.78
  4. Step 4: Simplify right side
    2,927.80x = 6,742,071.45
  5. Step 5: Solve for x
    x = 6,742,071.45/2,927.80
  6. Step 6: Final answer
    x = 2,302.78

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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.