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Finding the Fourth Proportional to 704.70, 1,056.69 and 271.98

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Solution

The fourth proportional to 704.70, 1,056.69 and 271.98 is: 407.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.70 : 1,056.69 = 271.98 : x
  2. Step 2: Convert to fraction form
    704.70/1,056.69 = 271.98/x
  3. Step 3: Cross multiply
    704.70x = 1,056.69 × 271.98
  4. Step 4: Simplify right side
    704.70x = 287,398.55
  5. Step 5: Solve for x
    x = 287,398.55/704.70
  6. Step 6: Final answer
    x = 407.83

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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.