Home / 3,178.18-4,770.32-1,328.80

Finding the Fourth Proportional to 3,178.18, 4,770.32 and 1,328.80

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Solution

The fourth proportional to 3,178.18, 4,770.32 and 1,328.80 is: 1,994.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.18 : 4,770.32 = 1,328.80 : x
  2. Step 2: Convert to fraction form
    3,178.18/4,770.32 = 1,328.80/x
  3. Step 3: Cross multiply
    3,178.18x = 4,770.32 × 1,328.80
  4. Step 4: Simplify right side
    3,178.18x = 6,338,801.22
  5. Step 5: Solve for x
    x = 6,338,801.22/3,178.18
  6. Step 6: Final answer
    x = 1,994.48

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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.