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Finding the Fourth Proportional to 992.58, 1,369.74 and 550.50

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Solution

The fourth proportional to 992.58, 1,369.74 and 550.50 is: 759.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.58 : 1,369.74 = 550.50 : x
  2. Step 2: Convert to fraction form
    992.58/1,369.74 = 550.50/x
  3. Step 3: Cross multiply
    992.58x = 1,369.74 × 550.50
  4. Step 4: Simplify right side
    992.58x = 754,034.15
  5. Step 5: Solve for x
    x = 754,034.15/992.58
  6. Step 6: Final answer
    x = 759.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.