Home / 2,358.99-3,255.40-1,311.05

Finding the Fourth Proportional to 2,358.99, 3,255.40 and 1,311.05

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Solution

The fourth proportional to 2,358.99, 3,255.40 and 1,311.05 is: 1,809.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,358.99 : 3,255.40 = 1,311.05 : x
  2. Step 2: Convert to fraction form
    2,358.99/3,255.40 = 1,311.05/x
  3. Step 3: Cross multiply
    2,358.99x = 3,255.40 × 1,311.05
  4. Step 4: Simplify right side
    2,358.99x = 4,268,001.95
  5. Step 5: Solve for x
    x = 4,268,001.95/2,358.99
  6. Step 6: Final answer
    x = 1,809.25

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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.