Home / 1,617.15-2,231.46-909.03

Finding the Fourth Proportional to 1,617.15, 2,231.46 and 909.03

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Solution

The fourth proportional to 1,617.15, 2,231.46 and 909.03 is: 1,254.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.15 : 2,231.46 = 909.03 : x
  2. Step 2: Convert to fraction form
    1,617.15/2,231.46 = 909.03/x
  3. Step 3: Cross multiply
    1,617.15x = 2,231.46 × 909.03
  4. Step 4: Simplify right side
    1,617.15x = 2,028,464.08
  5. Step 5: Solve for x
    x = 2,028,464.08/1,617.15
  6. Step 6: Final answer
    x = 1,254.35

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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.