Home / 2,142.25-2,957.21-1,396.85

Finding the Fourth Proportional to 2,142.25, 2,957.21 and 1,396.85

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Solution

The fourth proportional to 2,142.25, 2,957.21 and 1,396.85 is: 1,928.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.25 : 2,957.21 = 1,396.85 : x
  2. Step 2: Convert to fraction form
    2,142.25/2,957.21 = 1,396.85/x
  3. Step 3: Cross multiply
    2,142.25x = 2,957.21 × 1,396.85
  4. Step 4: Simplify right side
    2,142.25x = 4,130,762.26
  5. Step 5: Solve for x
    x = 4,130,762.26/2,142.25
  6. Step 6: Final answer
    x = 1,928.24

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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.