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Finding the Fourth Proportional to 2,909.51, 4,361.53 and 960.65

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Solution

The fourth proportional to 2,909.51, 4,361.53 and 960.65 is: 1,440.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,909.51 : 4,361.53 = 960.65 : x
  2. Step 2: Convert to fraction form
    2,909.51/4,361.53 = 960.65/x
  3. Step 3: Cross multiply
    2,909.51x = 4,361.53 × 960.65
  4. Step 4: Simplify right side
    2,909.51x = 4,189,903.79
  5. Step 5: Solve for x
    x = 4,189,903.79/2,909.51
  6. Step 6: Final answer
    x = 1,440.07

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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.