Home / 4,272.96-6,409.31-1,311.40

Finding the Fourth Proportional to 4,272.96, 6,409.31 and 1,311.40

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Solution

The fourth proportional to 4,272.96, 6,409.31 and 1,311.40 is: 1,967.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,272.96 : 6,409.31 = 1,311.40 : x
  2. Step 2: Convert to fraction form
    4,272.96/6,409.31 = 1,311.40/x
  3. Step 3: Cross multiply
    4,272.96x = 6,409.31 × 1,311.40
  4. Step 4: Simplify right side
    4,272.96x = 8,405,146.55
  5. Step 5: Solve for x
    x = 8,405,146.55/4,272.96
  6. Step 6: Final answer
    x = 1,967.05

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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.