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Finding the Fourth Proportional to 3,390.58, 4,678.46 and 1,898.56

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Solution

The fourth proportional to 3,390.58, 4,678.46 and 1,898.56 is: 2,619.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.58 : 4,678.46 = 1,898.56 : x
  2. Step 2: Convert to fraction form
    3,390.58/4,678.46 = 1,898.56/x
  3. Step 3: Cross multiply
    3,390.58x = 4,678.46 × 1,898.56
  4. Step 4: Simplify right side
    3,390.58x = 8,882,315.83
  5. Step 5: Solve for x
    x = 8,882,315.83/3,390.58
  6. Step 6: Final answer
    x = 2,619.71

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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.