Home / 1,441.67-2,160.68-921.47

Finding the Fourth Proportional to 1,441.67, 2,160.68 and 921.47

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Solution

The fourth proportional to 1,441.67, 2,160.68 and 921.47 is: 1,381.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.67 : 2,160.68 = 921.47 : x
  2. Step 2: Convert to fraction form
    1,441.67/2,160.68 = 921.47/x
  3. Step 3: Cross multiply
    1,441.67x = 2,160.68 × 921.47
  4. Step 4: Simplify right side
    1,441.67x = 1,990,986.39
  5. Step 5: Solve for x
    x = 1,990,986.39/1,441.67
  6. Step 6: Final answer
    x = 1,381.03

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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.