Home / 2,165.20-3,248.60-2,085.20

Finding the Fourth Proportional to 2,165.20, 3,248.60 and 2,085.20

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Solution

The fourth proportional to 2,165.20, 3,248.60 and 2,085.20 is: 3,128.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.20 : 3,248.60 = 2,085.20 : x
  2. Step 2: Convert to fraction form
    2,165.20/3,248.60 = 2,085.20/x
  3. Step 3: Cross multiply
    2,165.20x = 3,248.60 × 2,085.20
  4. Step 4: Simplify right side
    2,165.20x = 6,773,980.72
  5. Step 5: Solve for x
    x = 6,773,980.72/2,165.20
  6. Step 6: Final answer
    x = 3,128.57

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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.