Home / 2,130.72-2,940.40-1,186.48

Finding the Fourth Proportional to 2,130.72, 2,940.40 and 1,186.48

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Solution

The fourth proportional to 2,130.72, 2,940.40 and 1,186.48 is: 1,637.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.72 : 2,940.40 = 1,186.48 : x
  2. Step 2: Convert to fraction form
    2,130.72/2,940.40 = 1,186.48/x
  3. Step 3: Cross multiply
    2,130.72x = 2,940.40 × 1,186.48
  4. Step 4: Simplify right side
    2,130.72x = 3,488,725.79
  5. Step 5: Solve for x
    x = 3,488,725.79/2,130.72
  6. Step 6: Final answer
    x = 1,637.35

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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.