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Finding the Fourth Proportional to 706.98, 1,060.20 and 274.20

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Solution

The fourth proportional to 706.98, 1,060.20 and 274.20 is: 411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.98 : 1,060.20 = 274.20 : x
  2. Step 2: Convert to fraction form
    706.98/1,060.20 = 274.20/x
  3. Step 3: Cross multiply
    706.98x = 1,060.20 × 274.20
  4. Step 4: Simplify right side
    706.98x = 290,706.84
  5. Step 5: Solve for x
    x = 290,706.84/706.98
  6. Step 6: Final answer
    x = 411.20

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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.