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Finding the Fourth Proportional to 763.08, 1,144.98 and 378.33

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Solution

The fourth proportional to 763.08, 1,144.98 and 378.33 is: 567.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.08 : 1,144.98 = 378.33 : x
  2. Step 2: Convert to fraction form
    763.08/1,144.98 = 378.33/x
  3. Step 3: Cross multiply
    763.08x = 1,144.98 × 378.33
  4. Step 4: Simplify right side
    763.08x = 433,180.28
  5. Step 5: Solve for x
    x = 433,180.28/763.08
  6. Step 6: Final answer
    x = 567.67

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Double scale
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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.