Home / 2,647.45-3,651.28-1,985.77

Finding the Fourth Proportional to 2,647.45, 3,651.28 and 1,985.77

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Solution

The fourth proportional to 2,647.45, 3,651.28 and 1,985.77 is: 2,738.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.45 : 3,651.28 = 1,985.77 : x
  2. Step 2: Convert to fraction form
    2,647.45/3,651.28 = 1,985.77/x
  3. Step 3: Cross multiply
    2,647.45x = 3,651.28 × 1,985.77
  4. Step 4: Simplify right side
    2,647.45x = 7,250,602.29
  5. Step 5: Solve for x
    x = 7,250,602.29/2,647.45
  6. Step 6: Final answer
    x = 2,738.71

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Double scale
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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.