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Finding the Fourth Proportional to 3,119.82, 4,679.67 and 928.46

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Solution

The fourth proportional to 3,119.82, 4,679.67 and 928.46 is: 1,392.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.82 : 4,679.67 = 928.46 : x
  2. Step 2: Convert to fraction form
    3,119.82/4,679.67 = 928.46/x
  3. Step 3: Cross multiply
    3,119.82x = 4,679.67 × 928.46
  4. Step 4: Simplify right side
    3,119.82x = 4,344,901.59
  5. Step 5: Solve for x
    x = 4,344,901.59/3,119.82
  6. Step 6: Final answer
    x = 1,392.68

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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.