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Finding the Fourth Proportional to 1,678.74, 2,519.46 and 1,216.74

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Solution

The fourth proportional to 1,678.74, 2,519.46 and 1,216.74 is: 1,826.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.74 : 2,519.46 = 1,216.74 : x
  2. Step 2: Convert to fraction form
    1,678.74/2,519.46 = 1,216.74/x
  3. Step 3: Cross multiply
    1,678.74x = 2,519.46 × 1,216.74
  4. Step 4: Simplify right side
    1,678.74x = 3,065,527.76
  5. Step 5: Solve for x
    x = 3,065,527.76/1,678.74
  6. Step 6: Final answer
    x = 1,826.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.