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Finding the Fourth Proportional to 706.72, 1,060.05 and 419.98

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Solution

The fourth proportional to 706.72, 1,060.05 and 419.98 is: 629.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.72 : 1,060.05 = 419.98 : x
  2. Step 2: Convert to fraction form
    706.72/1,060.05 = 419.98/x
  3. Step 3: Cross multiply
    706.72x = 1,060.05 × 419.98
  4. Step 4: Simplify right side
    706.72x = 445,199.80
  5. Step 5: Solve for x
    x = 445,199.80/706.72
  6. Step 6: Final answer
    x = 629.95

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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.