Home / 2,120.65-2,926.48-1,189.15

Finding the Fourth Proportional to 2,120.65, 2,926.48 and 1,189.15

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Solution

The fourth proportional to 2,120.65, 2,926.48 and 1,189.15 is: 1,641.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.65 : 2,926.48 = 1,189.15 : x
  2. Step 2: Convert to fraction form
    2,120.65/2,926.48 = 1,189.15/x
  3. Step 3: Cross multiply
    2,120.65x = 2,926.48 × 1,189.15
  4. Step 4: Simplify right side
    2,120.65x = 3,480,023.69
  5. Step 5: Solve for x
    x = 3,480,023.69/2,120.65
  6. Step 6: Final answer
    x = 1,641.02

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1.5x scale

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.