Home / 4,309.80-6,464.70-1,388.40

Finding the Fourth Proportional to 4,309.80, 6,464.70 and 1,388.40

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Solution

The fourth proportional to 4,309.80, 6,464.70 and 1,388.40 is: 2,082.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,309.80 : 6,464.70 = 1,388.40 : x
  2. Step 2: Convert to fraction form
    4,309.80/6,464.70 = 1,388.40/x
  3. Step 3: Cross multiply
    4,309.80x = 6,464.70 × 1,388.40
  4. Step 4: Simplify right side
    4,309.80x = 8,975,589.48
  5. Step 5: Solve for x
    x = 8,975,589.48/4,309.80
  6. Step 6: Final answer
    x = 2,082.60

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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.