Home / 2,130.99-2,940.70-1,186.78

Finding the Fourth Proportional to 2,130.99, 2,940.70 and 1,186.78

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Solution

The fourth proportional to 2,130.99, 2,940.70 and 1,186.78 is: 1,637.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.99 : 2,940.70 = 1,186.78 : x
  2. Step 2: Convert to fraction form
    2,130.99/2,940.70 = 1,186.78/x
  3. Step 3: Cross multiply
    2,130.99x = 2,940.70 × 1,186.78
  4. Step 4: Simplify right side
    2,130.99x = 3,489,963.95
  5. Step 5: Solve for x
    x = 3,489,963.95/2,130.99
  6. Step 6: Final answer
    x = 1,637.72

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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.