Home / 1,409.24-2,118.41-1,307.78

Finding the Fourth Proportional to 1,409.24, 2,118.41 and 1,307.78

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Solution

The fourth proportional to 1,409.24, 2,118.41 and 1,307.78 is: 1,965.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.24 : 2,118.41 = 1,307.78 : x
  2. Step 2: Convert to fraction form
    1,409.24/2,118.41 = 1,307.78/x
  3. Step 3: Cross multiply
    1,409.24x = 2,118.41 × 1,307.78
  4. Step 4: Simplify right side
    1,409.24x = 2,770,414.23
  5. Step 5: Solve for x
    x = 2,770,414.23/1,409.24
  6. Step 6: Final answer
    x = 1,965.89

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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.