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Finding the Fourth Proportional to 1,971.80, 2,957.75 and 673.25

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Solution

The fourth proportional to 1,971.80, 2,957.75 and 673.25 is: 1,009.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.80 : 2,957.75 = 673.25 : x
  2. Step 2: Convert to fraction form
    1,971.80/2,957.75 = 673.25/x
  3. Step 3: Cross multiply
    1,971.80x = 2,957.75 × 673.25
  4. Step 4: Simplify right side
    1,971.80x = 1,991,301.82
  5. Step 5: Solve for x
    x = 1,991,301.82/1,971.80
  6. Step 6: Final answer
    x = 1,009.89

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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.