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Finding the Fourth Proportional to 958.20, 1,319.90 and 677.94

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Solution

The fourth proportional to 958.20, 1,319.90 and 677.94 is: 933.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.20 : 1,319.90 = 677.94 : x
  2. Step 2: Convert to fraction form
    958.20/1,319.90 = 677.94/x
  3. Step 3: Cross multiply
    958.20x = 1,319.90 × 677.94
  4. Step 4: Simplify right side
    958.20x = 894,809.62
  5. Step 5: Solve for x
    x = 894,809.62/958.20
  6. Step 6: Final answer
    x = 933.84

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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.