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Finding the Fourth Proportional to 738.74, 1,109.66 and 623.42

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Solution

The fourth proportional to 738.74, 1,109.66 and 623.42 is: 936.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.74 : 1,109.66 = 623.42 : x
  2. Step 2: Convert to fraction form
    738.74/1,109.66 = 623.42/x
  3. Step 3: Cross multiply
    738.74x = 1,109.66 × 623.42
  4. Step 4: Simplify right side
    738.74x = 691,775.57
  5. Step 5: Solve for x
    x = 691,775.57/738.74
  6. Step 6: Final answer
    x = 936.42

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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.