Home / 1,420.10-2,128.19-1,073.15

Finding the Fourth Proportional to 1,420.10, 2,128.19 and 1,073.15

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Solution

The fourth proportional to 1,420.10, 2,128.19 and 1,073.15 is: 1,608.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.10 : 2,128.19 = 1,073.15 : x
  2. Step 2: Convert to fraction form
    1,420.10/2,128.19 = 1,073.15/x
  3. Step 3: Cross multiply
    1,420.10x = 2,128.19 × 1,073.15
  4. Step 4: Simplify right side
    1,420.10x = 2,283,867.05
  5. Step 5: Solve for x
    x = 2,283,867.05/1,420.10
  6. Step 6: Final answer
    x = 1,608.24

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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.