Home / 1,421.75-2,128.48-1,148.38

Finding the Fourth Proportional to 1,421.75, 2,128.48 and 1,148.38

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Solution

The fourth proportional to 1,421.75, 2,128.48 and 1,148.38 is: 1,719.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.75 : 2,128.48 = 1,148.38 : x
  2. Step 2: Convert to fraction form
    1,421.75/2,128.48 = 1,148.38/x
  3. Step 3: Cross multiply
    1,421.75x = 2,128.48 × 1,148.38
  4. Step 4: Simplify right side
    1,421.75x = 2,444,295.67
  5. Step 5: Solve for x
    x = 2,444,295.67/1,421.75
  6. Step 6: Final answer
    x = 1,719.21

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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.