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Finding the Fourth Proportional to 706.72, 1,060.04 and 219.72

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Solution

The fourth proportional to 706.72, 1,060.04 and 219.72 is: 329.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.72 : 1,060.04 = 219.72 : x
  2. Step 2: Convert to fraction form
    706.72/1,060.04 = 219.72/x
  3. Step 3: Cross multiply
    706.72x = 1,060.04 × 219.72
  4. Step 4: Simplify right side
    706.72x = 232,911.99
  5. Step 5: Solve for x
    x = 232,911.99/706.72
  6. Step 6: Final answer
    x = 329.57

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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.