Home / 2,130.44-2,939.22-1,290.53

Finding the Fourth Proportional to 2,130.44, 2,939.22 and 1,290.53

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Solution

The fourth proportional to 2,130.44, 2,939.22 and 1,290.53 is: 1,780.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.44 : 2,939.22 = 1,290.53 : x
  2. Step 2: Convert to fraction form
    2,130.44/2,939.22 = 1,290.53/x
  3. Step 3: Cross multiply
    2,130.44x = 2,939.22 × 1,290.53
  4. Step 4: Simplify right side
    2,130.44x = 3,793,158.93
  5. Step 5: Solve for x
    x = 3,793,158.93/2,130.44
  6. Step 6: Final answer
    x = 1,780.46

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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.