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Finding the Fourth Proportional to 1,502.94, 2,074.09 and 839.79

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Solution

The fourth proportional to 1,502.94, 2,074.09 and 839.79 is: 1,158.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,502.94 : 2,074.09 = 839.79 : x
  2. Step 2: Convert to fraction form
    1,502.94/2,074.09 = 839.79/x
  3. Step 3: Cross multiply
    1,502.94x = 2,074.09 × 839.79
  4. Step 4: Simplify right side
    1,502.94x = 1,741,808.87
  5. Step 5: Solve for x
    x = 1,741,808.87/1,502.94
  6. Step 6: Final answer
    x = 1,158.93

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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.