Home / 3,490.21-4,815.89-1,977.70

Finding the Fourth Proportional to 3,490.21, 4,815.89 and 1,977.70

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Solution

The fourth proportional to 3,490.21, 4,815.89 and 1,977.70 is: 2,728.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,490.21 : 4,815.89 = 1,977.70 : x
  2. Step 2: Convert to fraction form
    3,490.21/4,815.89 = 1,977.70/x
  3. Step 3: Cross multiply
    3,490.21x = 4,815.89 × 1,977.70
  4. Step 4: Simplify right side
    3,490.21x = 9,524,380.17
  5. Step 5: Solve for x
    x = 9,524,380.17/3,490.21
  6. Step 6: Final answer
    x = 2,728.89

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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.