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Finding the Fourth Proportional to 681.33, 1,021.53 and 373.33

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Solution

The fourth proportional to 681.33, 1,021.53 and 373.33 is: 559.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.33 : 1,021.53 = 373.33 : x
  2. Step 2: Convert to fraction form
    681.33/1,021.53 = 373.33/x
  3. Step 3: Cross multiply
    681.33x = 1,021.53 × 373.33
  4. Step 4: Simplify right side
    681.33x = 381,367.79
  5. Step 5: Solve for x
    x = 381,367.79/681.33
  6. Step 6: Final answer
    x = 559.74

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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.