Home / 3,620.40-4,997.28-2,875.68

Finding the Fourth Proportional to 3,620.40, 4,997.28 and 2,875.68

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Solution

The fourth proportional to 3,620.40, 4,997.28 and 2,875.68 is: 3,969.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.40 : 4,997.28 = 2,875.68 : x
  2. Step 2: Convert to fraction form
    3,620.40/4,997.28 = 2,875.68/x
  3. Step 3: Cross multiply
    3,620.40x = 4,997.28 × 2,875.68
  4. Step 4: Simplify right side
    3,620.40x = 14,370,578.15
  5. Step 5: Solve for x
    x = 14,370,578.15/3,620.40
  6. Step 6: Final answer
    x = 3,969.33

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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.