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Finding the Fourth Proportional to 1,672.81, 2,308.56 and 1,009.65

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Solution

The fourth proportional to 1,672.81, 2,308.56 and 1,009.65 is: 1,393.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.81 : 2,308.56 = 1,009.65 : x
  2. Step 2: Convert to fraction form
    1,672.81/2,308.56 = 1,009.65/x
  3. Step 3: Cross multiply
    1,672.81x = 2,308.56 × 1,009.65
  4. Step 4: Simplify right side
    1,672.81x = 2,330,846.33
  5. Step 5: Solve for x
    x = 2,330,846.33/1,672.81
  6. Step 6: Final answer
    x = 1,393.37

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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.