Home / 1,520.28-2,109.29-1,455.48

Finding the Fourth Proportional to 1,520.28, 2,109.29 and 1,455.48

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Solution

The fourth proportional to 1,520.28, 2,109.29 and 1,455.48 is: 2,019.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.28 : 2,109.29 = 1,455.48 : x
  2. Step 2: Convert to fraction form
    1,520.28/2,109.29 = 1,455.48/x
  3. Step 3: Cross multiply
    1,520.28x = 2,109.29 × 1,455.48
  4. Step 4: Simplify right side
    1,520.28x = 3,070,022.13
  5. Step 5: Solve for x
    x = 3,070,022.13/1,520.28
  6. Step 6: Final answer
    x = 2,019.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.