Home / 2,985.12-4,478.42-2,109.35

Finding the Fourth Proportional to 2,985.12, 4,478.42 and 2,109.35

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Solution

The fourth proportional to 2,985.12, 4,478.42 and 2,109.35 is: 3,164.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.12 : 4,478.42 = 2,109.35 : x
  2. Step 2: Convert to fraction form
    2,985.12/4,478.42 = 2,109.35/x
  3. Step 3: Cross multiply
    2,985.12x = 4,478.42 × 2,109.35
  4. Step 4: Simplify right side
    2,985.12x = 9,446,522.29
  5. Step 5: Solve for x
    x = 9,446,522.29/2,985.12
  6. Step 6: Final answer
    x = 3,164.54

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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.