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Finding the Fourth Proportional to 955.86, 1,318.57 and 694.09

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Solution

The fourth proportional to 955.86, 1,318.57 and 694.09 is: 957.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.86 : 1,318.57 = 694.09 : x
  2. Step 2: Convert to fraction form
    955.86/1,318.57 = 694.09/x
  3. Step 3: Cross multiply
    955.86x = 1,318.57 × 694.09
  4. Step 4: Simplify right side
    955.86x = 915,206.25
  5. Step 5: Solve for x
    x = 915,206.25/955.86
  6. Step 6: Final answer
    x = 957.47

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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.