Home / 1,431.19-2,130.84-1,423.90

Finding the Fourth Proportional to 1,431.19, 2,130.84 and 1,423.90

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Solution

The fourth proportional to 1,431.19, 2,130.84 and 1,423.90 is: 2,119.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.19 : 2,130.84 = 1,423.90 : x
  2. Step 2: Convert to fraction form
    1,431.19/2,130.84 = 1,423.90/x
  3. Step 3: Cross multiply
    1,431.19x = 2,130.84 × 1,423.90
  4. Step 4: Simplify right side
    1,431.19x = 3,034,103.08
  5. Step 5: Solve for x
    x = 3,034,103.08/1,431.19
  6. Step 6: Final answer
    x = 2,119.99

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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.