Home / 2,438.88-3,365.58-1,390.89

Finding the Fourth Proportional to 2,438.88, 3,365.58 and 1,390.89

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Solution

The fourth proportional to 2,438.88, 3,365.58 and 1,390.89 is: 1,919.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,438.88 : 3,365.58 = 1,390.89 : x
  2. Step 2: Convert to fraction form
    2,438.88/3,365.58 = 1,390.89/x
  3. Step 3: Cross multiply
    2,438.88x = 3,365.58 × 1,390.89
  4. Step 4: Simplify right side
    2,438.88x = 4,681,151.57
  5. Step 5: Solve for x
    x = 4,681,151.57/2,438.88
  6. Step 6: Final answer
    x = 1,919.39

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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.