Home / 2,145.81-2,961.23-1,201.65

Finding the Fourth Proportional to 2,145.81, 2,961.23 and 1,201.65

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Solution

The fourth proportional to 2,145.81, 2,961.23 and 1,201.65 is: 1,658.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.81 : 2,961.23 = 1,201.65 : x
  2. Step 2: Convert to fraction form
    2,145.81/2,961.23 = 1,201.65/x
  3. Step 3: Cross multiply
    2,145.81x = 2,961.23 × 1,201.65
  4. Step 4: Simplify right side
    2,145.81x = 3,558,356.02
  5. Step 5: Solve for x
    x = 3,558,356.02/2,145.81
  6. Step 6: Final answer
    x = 1,658.28

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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.