Home / 1,421.79-2,123.22-1,406.54

Finding the Fourth Proportional to 1,421.79, 2,123.22 and 1,406.54

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Solution

The fourth proportional to 1,421.79, 2,123.22 and 1,406.54 is: 2,100.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.79 : 2,123.22 = 1,406.54 : x
  2. Step 2: Convert to fraction form
    1,421.79/2,123.22 = 1,406.54/x
  3. Step 3: Cross multiply
    1,421.79x = 2,123.22 × 1,406.54
  4. Step 4: Simplify right side
    1,421.79x = 2,986,383.24
  5. Step 5: Solve for x
    x = 2,986,383.24/1,421.79
  6. Step 6: Final answer
    x = 2,100.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.