Home / 3,189.20-4,783.80-1,342.40

Finding the Fourth Proportional to 3,189.20, 4,783.80 and 1,342.40

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Solution

The fourth proportional to 3,189.20, 4,783.80 and 1,342.40 is: 2,013.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.20 : 4,783.80 = 1,342.40 : x
  2. Step 2: Convert to fraction form
    3,189.20/4,783.80 = 1,342.40/x
  3. Step 3: Cross multiply
    3,189.20x = 4,783.80 × 1,342.40
  4. Step 4: Simplify right side
    3,189.20x = 6,421,773.12
  5. Step 5: Solve for x
    x = 6,421,773.12/3,189.20
  6. Step 6: Final answer
    x = 2,013.60

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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.