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Finding the Fourth Proportional to 1,783.62, 2,669.59 and 991.68

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Solution

The fourth proportional to 1,783.62, 2,669.59 and 991.68 is: 1,484.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.62 : 2,669.59 = 991.68 : x
  2. Step 2: Convert to fraction form
    1,783.62/2,669.59 = 991.68/x
  3. Step 3: Cross multiply
    1,783.62x = 2,669.59 × 991.68
  4. Step 4: Simplify right side
    1,783.62x = 2,647,370.24
  5. Step 5: Solve for x
    x = 2,647,370.24/1,783.62
  6. Step 6: Final answer
    x = 1,484.27

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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.