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Finding the Fourth Proportional to 1,804.65, 2,708.49 and 709.80

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Solution

The fourth proportional to 1,804.65, 2,708.49 and 709.80 is: 1,065.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,804.65 : 2,708.49 = 709.80 : x
  2. Step 2: Convert to fraction form
    1,804.65/2,708.49 = 709.80/x
  3. Step 3: Cross multiply
    1,804.65x = 2,708.49 × 709.80
  4. Step 4: Simplify right side
    1,804.65x = 1,922,486.20
  5. Step 5: Solve for x
    x = 1,922,486.20/1,804.65
  6. Step 6: Final answer
    x = 1,065.30

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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.