Home / 1,431.21-2,129.67-1,426.35

Finding the Fourth Proportional to 1,431.21, 2,129.67 and 1,426.35

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Solution

The fourth proportional to 1,431.21, 2,129.67 and 1,426.35 is: 2,122.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.21 : 2,129.67 = 1,426.35 : x
  2. Step 2: Convert to fraction form
    1,431.21/2,129.67 = 1,426.35/x
  3. Step 3: Cross multiply
    1,431.21x = 2,129.67 × 1,426.35
  4. Step 4: Simplify right side
    1,431.21x = 3,037,654.80
  5. Step 5: Solve for x
    x = 3,037,654.80/1,431.21
  6. Step 6: Final answer
    x = 2,122.44

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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.