Home / 2,056.40-2,836.80-1,216.70

Finding the Fourth Proportional to 2,056.40, 2,836.80 and 1,216.70

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Solution

The fourth proportional to 2,056.40, 2,836.80 and 1,216.70 is: 1,678.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,056.40 : 2,836.80 = 1,216.70 : x
  2. Step 2: Convert to fraction form
    2,056.40/2,836.80 = 1,216.70/x
  3. Step 3: Cross multiply
    2,056.40x = 2,836.80 × 1,216.70
  4. Step 4: Simplify right side
    2,056.40x = 3,451,534.56
  5. Step 5: Solve for x
    x = 3,451,534.56/2,056.40
  6. Step 6: Final answer
    x = 1,678.44

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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.