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Finding the Fourth Proportional to 1,779.89, 2,670.74 and 958.95

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Solution

The fourth proportional to 1,779.89, 2,670.74 and 958.95 is: 1,438.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.89 : 2,670.74 = 958.95 : x
  2. Step 2: Convert to fraction form
    1,779.89/2,670.74 = 958.95/x
  3. Step 3: Cross multiply
    1,779.89x = 2,670.74 × 958.95
  4. Step 4: Simplify right side
    1,779.89x = 2,561,101.33
  5. Step 5: Solve for x
    x = 2,561,101.33/1,779.89
  6. Step 6: Final answer
    x = 1,438.91

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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.