Home / 1,330.67-1,992.90-1,284.53

Finding the Fourth Proportional to 1,330.67, 1,992.90 and 1,284.53

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Solution

The fourth proportional to 1,330.67, 1,992.90 and 1,284.53 is: 1,923.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.67 : 1,992.90 = 1,284.53 : x
  2. Step 2: Convert to fraction form
    1,330.67/1,992.90 = 1,284.53/x
  3. Step 3: Cross multiply
    1,330.67x = 1,992.90 × 1,284.53
  4. Step 4: Simplify right side
    1,330.67x = 2,559,939.84
  5. Step 5: Solve for x
    x = 2,559,939.84/1,330.67
  6. Step 6: Final answer
    x = 1,923.80

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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.