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Finding the Fourth Proportional to 4,699.90, 6,485.41 and 2,811.10

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Solution

The fourth proportional to 4,699.90, 6,485.41 and 2,811.10 is: 3,879.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,699.90 : 6,485.41 = 2,811.10 : x
  2. Step 2: Convert to fraction form
    4,699.90/6,485.41 = 2,811.10/x
  3. Step 3: Cross multiply
    4,699.90x = 6,485.41 × 2,811.10
  4. Step 4: Simplify right side
    4,699.90x = 18,231,136.05
  5. Step 5: Solve for x
    x = 18,231,136.05/4,699.90
  6. Step 6: Final answer
    x = 3,879.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.