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Finding the Fourth Proportional to 958.08, 1,323.84 and 912.96

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Solution

The fourth proportional to 958.08, 1,323.84 and 912.96 is: 1,261.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.08 : 1,323.84 = 912.96 : x
  2. Step 2: Convert to fraction form
    958.08/1,323.84 = 912.96/x
  3. Step 3: Cross multiply
    958.08x = 1,323.84 × 912.96
  4. Step 4: Simplify right side
    958.08x = 1,208,612.97
  5. Step 5: Solve for x
    x = 1,208,612.97/958.08
  6. Step 6: Final answer
    x = 1,261.49

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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.