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Finding the Fourth Proportional to 1,206.77, 1,808.26 and 719.56

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Solution

The fourth proportional to 1,206.77, 1,808.26 and 719.56 is: 1,078.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.77 : 1,808.26 = 719.56 : x
  2. Step 2: Convert to fraction form
    1,206.77/1,808.26 = 719.56/x
  3. Step 3: Cross multiply
    1,206.77x = 1,808.26 × 719.56
  4. Step 4: Simplify right side
    1,206.77x = 1,301,151.57
  5. Step 5: Solve for x
    x = 1,301,151.57/1,206.77
  6. Step 6: Final answer
    x = 1,078.21

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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.