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Finding the Fourth Proportional to 1,050.72, 1,450.32 and 719

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Solution

The fourth proportional to 1,050.72, 1,450.32 and 719 is: 992.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.72 : 1,450.32 = 719 : x
  2. Step 2: Convert to fraction form
    1,050.72/1,450.32 = 719/x
  3. Step 3: Cross multiply
    1,050.72x = 1,450.32 × 719
  4. Step 4: Simplify right side
    1,050.72x = 1,042,780.08
  5. Step 5: Solve for x
    x = 1,042,780.08/1,050.72
  6. Step 6: Final answer
    x = 992.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.