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Finding the Fourth Proportional to 1,783.71, 2,674.59 and 993.31

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Solution

The fourth proportional to 1,783.71, 2,674.59 and 993.31 is: 1,489.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.71 : 2,674.59 = 993.31 : x
  2. Step 2: Convert to fraction form
    1,783.71/2,674.59 = 993.31/x
  3. Step 3: Cross multiply
    1,783.71x = 2,674.59 × 993.31
  4. Step 4: Simplify right side
    1,783.71x = 2,656,696.99
  5. Step 5: Solve for x
    x = 2,656,696.99/1,783.71
  6. Step 6: Final answer
    x = 1,489.42

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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.