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Finding the Fourth Proportional to 2,185.71, 3,279.66 and 799.39

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Solution

The fourth proportional to 2,185.71, 3,279.66 and 799.39 is: 1,199.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.71 : 3,279.66 = 799.39 : x
  2. Step 2: Convert to fraction form
    2,185.71/3,279.66 = 799.39/x
  3. Step 3: Cross multiply
    2,185.71x = 3,279.66 × 799.39
  4. Step 4: Simplify right side
    2,185.71x = 2,621,727.41
  5. Step 5: Solve for x
    x = 2,621,727.41/2,185.71
  6. Step 6: Final answer
    x = 1,199.49

Related Problems

Find fourth proportional to 1,092.86, 1,639.83 and 399.70
Half scale
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Double scale
Find fourth proportional to 2,186.71, 3,281.16 and 800.39
Similar ratio
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1.5x scale

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.