Home / 4,200.60-6,300.90-3,109.80

Finding the Fourth Proportional to 4,200.60, 6,300.90 and 3,109.80

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Solution

The fourth proportional to 4,200.60, 6,300.90 and 3,109.80 is: 4,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,200.60 : 6,300.90 = 3,109.80 : x
  2. Step 2: Convert to fraction form
    4,200.60/6,300.90 = 3,109.80/x
  3. Step 3: Cross multiply
    4,200.60x = 6,300.90 × 3,109.80
  4. Step 4: Simplify right side
    4,200.60x = 19,594,538.82
  5. Step 5: Solve for x
    x = 19,594,538.82/4,200.60
  6. Step 6: Final answer
    x = 4,664.70

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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.