Home / 1,520.67-2,098.26-857.55

Finding the Fourth Proportional to 1,520.67, 2,098.26 and 857.55

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Solution

The fourth proportional to 1,520.67, 2,098.26 and 857.55 is: 1,183.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.67 : 2,098.26 = 857.55 : x
  2. Step 2: Convert to fraction form
    1,520.67/2,098.26 = 857.55/x
  3. Step 3: Cross multiply
    1,520.67x = 2,098.26 × 857.55
  4. Step 4: Simplify right side
    1,520.67x = 1,799,362.86
  5. Step 5: Solve for x
    x = 1,799,362.86/1,520.67
  6. Step 6: Final answer
    x = 1,183.27

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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.