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Finding the Fourth Proportional to 2,910.65, 4,365.97 and 719.42

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Solution

The fourth proportional to 2,910.65, 4,365.97 and 719.42 is: 1,079.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,910.65 : 4,365.97 = 719.42 : x
  2. Step 2: Convert to fraction form
    2,910.65/4,365.97 = 719.42/x
  3. Step 3: Cross multiply
    2,910.65x = 4,365.97 × 719.42
  4. Step 4: Simplify right side
    2,910.65x = 3,140,942.51
  5. Step 5: Solve for x
    x = 3,140,942.51/2,910.65
  6. Step 6: Final answer
    x = 1,079.12

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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.