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Finding the Fourth Proportional to 1,674.76, 2,309.16 and 1,085.08

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Solution

The fourth proportional to 1,674.76, 2,309.16 and 1,085.08 is: 1,496.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,674.76 : 2,309.16 = 1,085.08 : x
  2. Step 2: Convert to fraction form
    1,674.76/2,309.16 = 1,085.08/x
  3. Step 3: Cross multiply
    1,674.76x = 2,309.16 × 1,085.08
  4. Step 4: Simplify right side
    1,674.76x = 2,505,623.33
  5. Step 5: Solve for x
    x = 2,505,623.33/1,674.76
  6. Step 6: Final answer
    x = 1,496.11

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Half scale
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Double scale
Find fourth proportional to 1,675.76, 2,310.54 and 1,086.08
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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.