Home / 1,620.29-2,431.25-695.60

Finding the Fourth Proportional to 1,620.29, 2,431.25 and 695.60

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Solution

The fourth proportional to 1,620.29, 2,431.25 and 695.60 is: 1,043.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.29 : 2,431.25 = 695.60 : x
  2. Step 2: Convert to fraction form
    1,620.29/2,431.25 = 695.60/x
  3. Step 3: Cross multiply
    1,620.29x = 2,431.25 × 695.60
  4. Step 4: Simplify right side
    1,620.29x = 1,691,177.50
  5. Step 5: Solve for x
    x = 1,691,177.50/1,620.29
  6. Step 6: Final answer
    x = 1,043.75

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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.