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Finding the Fourth Proportional to 1,610.51, 2,222.78 and 911.88

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Solution

The fourth proportional to 1,610.51, 2,222.78 and 911.88 is: 1,258.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,610.51 : 2,222.78 = 911.88 : x
  2. Step 2: Convert to fraction form
    1,610.51/2,222.78 = 911.88/x
  3. Step 3: Cross multiply
    1,610.51x = 2,222.78 × 911.88
  4. Step 4: Simplify right side
    1,610.51x = 2,026,904.07
  5. Step 5: Solve for x
    x = 2,026,904.07/1,610.51
  6. Step 6: Final answer
    x = 1,258.55

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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.