Home / 2,130.59-2,940.36-1,291.33

Finding the Fourth Proportional to 2,130.59, 2,940.36 and 1,291.33

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Solution

The fourth proportional to 2,130.59, 2,940.36 and 1,291.33 is: 1,782.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.59 : 2,940.36 = 1,291.33 : x
  2. Step 2: Convert to fraction form
    2,130.59/2,940.36 = 1,291.33/x
  3. Step 3: Cross multiply
    2,130.59x = 2,940.36 × 1,291.33
  4. Step 4: Simplify right side
    2,130.59x = 3,796,975.08
  5. Step 5: Solve for x
    x = 3,796,975.08/2,130.59
  6. Step 6: Final answer
    x = 1,782.12

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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.