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Finding the Fourth Proportional to 2,169.64, 3,255.08 and 782.94

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Solution

The fourth proportional to 2,169.64, 3,255.08 and 782.94 is: 1,174.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.64 : 3,255.08 = 782.94 : x
  2. Step 2: Convert to fraction form
    2,169.64/3,255.08 = 782.94/x
  3. Step 3: Cross multiply
    2,169.64x = 3,255.08 × 782.94
  4. Step 4: Simplify right side
    2,169.64x = 2,548,532.34
  5. Step 5: Solve for x
    x = 2,548,532.34/2,169.64
  6. Step 6: Final answer
    x = 1,174.63

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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.