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Finding the Fourth Proportional to 3,992.34, 5,988.78 and 2,909.64

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Solution

The fourth proportional to 3,992.34, 5,988.78 and 2,909.64 is: 4,364.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.34 : 5,988.78 = 2,909.64 : x
  2. Step 2: Convert to fraction form
    3,992.34/5,988.78 = 2,909.64/x
  3. Step 3: Cross multiply
    3,992.34x = 5,988.78 × 2,909.64
  4. Step 4: Simplify right side
    3,992.34x = 17,425,193.84
  5. Step 5: Solve for x
    x = 17,425,193.84/3,992.34
  6. Step 6: Final answer
    x = 4,364.66

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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.