Home / 1,421.56-2,128.58-1,114.04

Finding the Fourth Proportional to 1,421.56, 2,128.58 and 1,114.04

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Solution

The fourth proportional to 1,421.56, 2,128.58 and 1,114.04 is: 1,668.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.56 : 2,128.58 = 1,114.04 : x
  2. Step 2: Convert to fraction form
    1,421.56/2,128.58 = 1,114.04/x
  3. Step 3: Cross multiply
    1,421.56x = 2,128.58 × 1,114.04
  4. Step 4: Simplify right side
    1,421.56x = 2,371,323.26
  5. Step 5: Solve for x
    x = 2,371,323.26/1,421.56
  6. Step 6: Final answer
    x = 1,668.11

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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.