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Finding the Fourth Proportional to 1,208.51, 1,821.00 and 993.94

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Solution

The fourth proportional to 1,208.51, 1,821.00 and 993.94 is: 1,497.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.51 : 1,821.00 = 993.94 : x
  2. Step 2: Convert to fraction form
    1,208.51/1,821.00 = 993.94/x
  3. Step 3: Cross multiply
    1,208.51x = 1,821.00 × 993.94
  4. Step 4: Simplify right side
    1,208.51x = 1,809,959.77
  5. Step 5: Solve for x
    x = 1,809,959.77/1,208.51
  6. Step 6: Final answer
    x = 1,497.68

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.