Home / 2,751.30-4,128.30-1,290.20

Finding the Fourth Proportional to 2,751.30, 4,128.30 and 1,290.20

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Solution

The fourth proportional to 2,751.30, 4,128.30 and 1,290.20 is: 1,935.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,751.30 : 4,128.30 = 1,290.20 : x
  2. Step 2: Convert to fraction form
    2,751.30/4,128.30 = 1,290.20/x
  3. Step 3: Cross multiply
    2,751.30x = 4,128.30 × 1,290.20
  4. Step 4: Simplify right side
    2,751.30x = 5,326,312.02
  5. Step 5: Solve for x
    x = 5,326,312.02/2,751.30
  6. Step 6: Final answer
    x = 1,935.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.