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Finding the Fourth Proportional to 1,329.24, 1,991.49 and 808.98

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Solution

The fourth proportional to 1,329.24, 1,991.49 and 808.98 is: 1,212.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.24 : 1,991.49 = 808.98 : x
  2. Step 2: Convert to fraction form
    1,329.24/1,991.49 = 808.98/x
  3. Step 3: Cross multiply
    1,329.24x = 1,991.49 × 808.98
  4. Step 4: Simplify right side
    1,329.24x = 1,611,071.83
  5. Step 5: Solve for x
    x = 1,611,071.83/1,329.24
  6. Step 6: Final answer
    x = 1,212.02

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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.