Home / 1,438.80-2,148.42-1,246.80

Finding the Fourth Proportional to 1,438.80, 2,148.42 and 1,246.80

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Solution

The fourth proportional to 1,438.80, 2,148.42 and 1,246.80 is: 1,861.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.80 : 2,148.42 = 1,246.80 : x
  2. Step 2: Convert to fraction form
    1,438.80/2,148.42 = 1,246.80/x
  3. Step 3: Cross multiply
    1,438.80x = 2,148.42 × 1,246.80
  4. Step 4: Simplify right side
    1,438.80x = 2,678,650.06
  5. Step 5: Solve for x
    x = 2,678,650.06/1,438.80
  6. Step 6: Final answer
    x = 1,861.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.