Home / 1,420.10-2,126.10-1,379.60

Finding the Fourth Proportional to 1,420.10, 2,126.10 and 1,379.60

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Solution

The fourth proportional to 1,420.10, 2,126.10 and 1,379.60 is: 2,065.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.10 : 2,126.10 = 1,379.60 : x
  2. Step 2: Convert to fraction form
    1,420.10/2,126.10 = 1,379.60/x
  3. Step 3: Cross multiply
    1,420.10x = 2,126.10 × 1,379.60
  4. Step 4: Simplify right side
    1,420.10x = 2,933,167.56
  5. Step 5: Solve for x
    x = 2,933,167.56/1,420.10
  6. Step 6: Final answer
    x = 2,065.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.