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Finding the Fourth Proportional to 4,779.81, 7,171.34 and 2,932.20

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Solution

The fourth proportional to 4,779.81, 7,171.34 and 2,932.20 is: 4,399.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,779.81 : 7,171.34 = 2,932.20 : x
  2. Step 2: Convert to fraction form
    4,779.81/7,171.34 = 2,932.20/x
  3. Step 3: Cross multiply
    4,779.81x = 7,171.34 × 2,932.20
  4. Step 4: Simplify right side
    4,779.81x = 21,027,788.49
  5. Step 5: Solve for x
    x = 21,027,788.49/4,779.81
  6. Step 6: Final answer
    x = 4,399.29

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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.