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Finding the Fourth Proportional to 958.08, 1,321.71 and 626.39

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Solution

The fourth proportional to 958.08, 1,321.71 and 626.39 is: 864.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.08 : 1,321.71 = 626.39 : x
  2. Step 2: Convert to fraction form
    958.08/1,321.71 = 626.39/x
  3. Step 3: Cross multiply
    958.08x = 1,321.71 × 626.39
  4. Step 4: Simplify right side
    958.08x = 827,905.93
  5. Step 5: Solve for x
    x = 827,905.93/958.08
  6. Step 6: Final answer
    x = 864.13

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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.