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Finding the Fourth Proportional to 1,610.42, 2,222.34 and 911.84

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Solution

The fourth proportional to 1,610.42, 2,222.34 and 911.84 is: 1,258.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,610.42 : 2,222.34 = 911.84 : x
  2. Step 2: Convert to fraction form
    1,610.42/2,222.34 = 911.84/x
  3. Step 3: Cross multiply
    1,610.42x = 2,222.34 × 911.84
  4. Step 4: Simplify right side
    1,610.42x = 2,026,418.51
  5. Step 5: Solve for x
    x = 2,026,418.51/1,610.42
  6. Step 6: Final answer
    x = 1,258.32

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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.