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Finding the Fourth Proportional to 3,118.74, 4,679 and 927.56

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Solution

The fourth proportional to 3,118.74, 4,679 and 927.56 is: 1,391.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.74 : 4,679 = 927.56 : x
  2. Step 2: Convert to fraction form
    3,118.74/4,679 = 927.56/x
  3. Step 3: Cross multiply
    3,118.74x = 4,679 × 927.56
  4. Step 4: Simplify right side
    3,118.74x = 4,340,053.24
  5. Step 5: Solve for x
    x = 4,340,053.24/3,118.74
  6. Step 6: Final answer
    x = 1,391.60

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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.