Home / 1,520.15-2,097.77-856.97

Finding the Fourth Proportional to 1,520.15, 2,097.77 and 856.97

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Solution

The fourth proportional to 1,520.15, 2,097.77 and 856.97 is: 1,182.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.15 : 2,097.77 = 856.97 : x
  2. Step 2: Convert to fraction form
    1,520.15/2,097.77 = 856.97/x
  3. Step 3: Cross multiply
    1,520.15x = 2,097.77 × 856.97
  4. Step 4: Simplify right side
    1,520.15x = 1,797,725.96
  5. Step 5: Solve for x
    x = 1,797,725.96/1,520.15
  6. Step 6: Final answer
    x = 1,182.60

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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.