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Finding the Fourth Proportional to 704.54, 1,056.80 and 271.79

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Solution

The fourth proportional to 704.54, 1,056.80 and 271.79 is: 407.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.54 : 1,056.80 = 271.79 : x
  2. Step 2: Convert to fraction form
    704.54/1,056.80 = 271.79/x
  3. Step 3: Cross multiply
    704.54x = 1,056.80 × 271.79
  4. Step 4: Simplify right side
    704.54x = 287,221.03
  5. Step 5: Solve for x
    x = 287,221.03/704.54
  6. Step 6: Final answer
    x = 407.67

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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.