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Finding the Fourth Proportional to 1,812.96, 2,721.06 and 719.46

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Solution

The fourth proportional to 1,812.96, 2,721.06 and 719.46 is: 1,079.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.96 : 2,721.06 = 719.46 : x
  2. Step 2: Convert to fraction form
    1,812.96/2,721.06 = 719.46/x
  3. Step 3: Cross multiply
    1,812.96x = 2,721.06 × 719.46
  4. Step 4: Simplify right side
    1,812.96x = 1,957,693.83
  5. Step 5: Solve for x
    x = 1,957,693.83/1,812.96
  6. Step 6: Final answer
    x = 1,079.83

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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.