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Finding the Fourth Proportional to 747.64, 1,121.60 and 336.79

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Solution

The fourth proportional to 747.64, 1,121.60 and 336.79 is: 505.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.64 : 1,121.60 = 336.79 : x
  2. Step 2: Convert to fraction form
    747.64/1,121.60 = 336.79/x
  3. Step 3: Cross multiply
    747.64x = 1,121.60 × 336.79
  4. Step 4: Simplify right side
    747.64x = 377,741.70
  5. Step 5: Solve for x
    x = 377,741.70/747.64
  6. Step 6: Final answer
    x = 505.25

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.