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Finding the Fourth Proportional to 1,668.39, 2,302.40 and 969.77

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Solution

The fourth proportional to 1,668.39, 2,302.40 and 969.77 is: 1,338.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.39 : 2,302.40 = 969.77 : x
  2. Step 2: Convert to fraction form
    1,668.39/2,302.40 = 969.77/x
  3. Step 3: Cross multiply
    1,668.39x = 2,302.40 × 969.77
  4. Step 4: Simplify right side
    1,668.39x = 2,232,789.36
  5. Step 5: Solve for x
    x = 2,232,789.36/1,668.39
  6. Step 6: Final answer
    x = 1,338.29

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1.5x scale

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.