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Finding the Fourth Proportional to 958.38, 1,322.78 and 609

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Solution

The fourth proportional to 958.38, 1,322.78 and 609 is: 840.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.38 : 1,322.78 = 609 : x
  2. Step 2: Convert to fraction form
    958.38/1,322.78 = 609/x
  3. Step 3: Cross multiply
    958.38x = 1,322.78 × 609
  4. Step 4: Simplify right side
    958.38x = 805,569.98
  5. Step 5: Solve for x
    x = 805,569.98/958.38
  6. Step 6: Final answer
    x = 840.55

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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.