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Finding the Fourth Proportional to 2,690.96, 4,036.60 and 959.12

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Solution

The fourth proportional to 2,690.96, 4,036.60 and 959.12 is: 1,438.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.96 : 4,036.60 = 959.12 : x
  2. Step 2: Convert to fraction form
    2,690.96/4,036.60 = 959.12/x
  3. Step 3: Cross multiply
    2,690.96x = 4,036.60 × 959.12
  4. Step 4: Simplify right side
    2,690.96x = 3,871,583.79
  5. Step 5: Solve for x
    x = 3,871,583.79/2,690.96
  6. Step 6: Final answer
    x = 1,438.74

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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.