Home / 2,113.79-3,170.67-1,290.47

Finding the Fourth Proportional to 2,113.79, 3,170.67 and 1,290.47

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Solution

The fourth proportional to 2,113.79, 3,170.67 and 1,290.47 is: 1,935.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.79 : 3,170.67 = 1,290.47 : x
  2. Step 2: Convert to fraction form
    2,113.79/3,170.67 = 1,290.47/x
  3. Step 3: Cross multiply
    2,113.79x = 3,170.67 × 1,290.47
  4. Step 4: Simplify right side
    2,113.79x = 4,091,638.66
  5. Step 5: Solve for x
    x = 4,091,638.66/2,113.79
  6. Step 6: Final answer
    x = 1,935.69

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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.