Home / 2,438.28-3,364.80-1,390.36

Finding the Fourth Proportional to 2,438.28, 3,364.80 and 1,390.36

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Solution

The fourth proportional to 2,438.28, 3,364.80 and 1,390.36 is: 1,918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,438.28 : 3,364.80 = 1,390.36 : x
  2. Step 2: Convert to fraction form
    2,438.28/3,364.80 = 1,390.36/x
  3. Step 3: Cross multiply
    2,438.28x = 3,364.80 × 1,390.36
  4. Step 4: Simplify right side
    2,438.28x = 4,678,283.33
  5. Step 5: Solve for x
    x = 4,678,283.33/2,438.28
  6. Step 6: Final answer
    x = 1,918.68

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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.