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Finding the Fourth Proportional to 704.55, 1,056.63 and 210.85

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Solution

The fourth proportional to 704.55, 1,056.63 and 210.85 is: 316.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.55 : 1,056.63 = 210.85 : x
  2. Step 2: Convert to fraction form
    704.55/1,056.63 = 210.85/x
  3. Step 3: Cross multiply
    704.55x = 1,056.63 × 210.85
  4. Step 4: Simplify right side
    704.55x = 222,790.44
  5. Step 5: Solve for x
    x = 222,790.44/704.55
  6. Step 6: Final answer
    x = 316.22

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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.