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Finding the Fourth Proportional to 958.58, 1,323.24 and 678.86

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Solution

The fourth proportional to 958.58, 1,323.24 and 678.86 is: 937.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.58 : 1,323.24 = 678.86 : x
  2. Step 2: Convert to fraction form
    958.58/1,323.24 = 678.86/x
  3. Step 3: Cross multiply
    958.58x = 1,323.24 × 678.86
  4. Step 4: Simplify right side
    958.58x = 898,294.71
  5. Step 5: Solve for x
    x = 898,294.71/958.58
  6. Step 6: Final answer
    x = 937.11

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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.