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Finding the Fourth Proportional to 749.20, 1,122.96 and 364.72

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Solution

The fourth proportional to 749.20, 1,122.96 and 364.72 is: 546.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.20 : 1,122.96 = 364.72 : x
  2. Step 2: Convert to fraction form
    749.20/1,122.96 = 364.72/x
  3. Step 3: Cross multiply
    749.20x = 1,122.96 × 364.72
  4. Step 4: Simplify right side
    749.20x = 409,565.97
  5. Step 5: Solve for x
    x = 409,565.97/749.20
  6. Step 6: Final answer
    x = 546.67

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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.