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Finding the Fourth Proportional to 2,768.58, 3,820.68 and 1,509.70

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Solution

The fourth proportional to 2,768.58, 3,820.68 and 1,509.70 is: 2,083.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.58 : 3,820.68 = 1,509.70 : x
  2. Step 2: Convert to fraction form
    2,768.58/3,820.68 = 1,509.70/x
  3. Step 3: Cross multiply
    2,768.58x = 3,820.68 × 1,509.70
  4. Step 4: Simplify right side
    2,768.58x = 5,768,080.60
  5. Step 5: Solve for x
    x = 5,768,080.60/2,768.58
  6. Step 6: Final answer
    x = 2,083.41

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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.