Home / 3,138.85-4,702-1,888.75

Finding the Fourth Proportional to 3,138.85, 4,702 and 1,888.75

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Solution

The fourth proportional to 3,138.85, 4,702 and 1,888.75 is: 2,829.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.85 : 4,702 = 1,888.75 : x
  2. Step 2: Convert to fraction form
    3,138.85/4,702 = 1,888.75/x
  3. Step 3: Cross multiply
    3,138.85x = 4,702 × 1,888.75
  4. Step 4: Simplify right side
    3,138.85x = 8,880,902.50
  5. Step 5: Solve for x
    x = 8,880,902.50/3,138.85
  6. Step 6: Final answer
    x = 2,829.35

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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.