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Finding the Fourth Proportional to 1,611.12, 2,223.38 and 948

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Solution

The fourth proportional to 1,611.12, 2,223.38 and 948 is: 1,308.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.12 : 2,223.38 = 948 : x
  2. Step 2: Convert to fraction form
    1,611.12/2,223.38 = 948/x
  3. Step 3: Cross multiply
    1,611.12x = 2,223.38 × 948
  4. Step 4: Simplify right side
    1,611.12x = 2,107,764.24
  5. Step 5: Solve for x
    x = 2,107,764.24/1,611.12
  6. Step 6: Final answer
    x = 1,308.26

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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.