Home / 3,897.56-5,380.58-2,645.20

Finding the Fourth Proportional to 3,897.56, 5,380.58 and 2,645.20

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Solution

The fourth proportional to 3,897.56, 5,380.58 and 2,645.20 is: 3,651.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897.56 : 5,380.58 = 2,645.20 : x
  2. Step 2: Convert to fraction form
    3,897.56/5,380.58 = 2,645.20/x
  3. Step 3: Cross multiply
    3,897.56x = 5,380.58 × 2,645.20
  4. Step 4: Simplify right side
    3,897.56x = 14,232,710.22
  5. Step 5: Solve for x
    x = 14,232,710.22/3,897.56
  6. Step 6: Final answer
    x = 3,651.70

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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.