Home / 1,456.24-2,170.64-1,339.60

Finding the Fourth Proportional to 1,456.24, 2,170.64 and 1,339.60

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Solution

The fourth proportional to 1,456.24, 2,170.64 and 1,339.60 is: 1,996.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,456.24 : 2,170.64 = 1,339.60 : x
  2. Step 2: Convert to fraction form
    1,456.24/2,170.64 = 1,339.60/x
  3. Step 3: Cross multiply
    1,456.24x = 2,170.64 × 1,339.60
  4. Step 4: Simplify right side
    1,456.24x = 2,907,789.34
  5. Step 5: Solve for x
    x = 2,907,789.34/1,456.24
  6. Step 6: Final answer
    x = 1,996.78

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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.