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Finding the Fourth Proportional to 963.84, 1,329.18 and 683.58

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Solution

The fourth proportional to 963.84, 1,329.18 and 683.58 is: 942.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.84 : 1,329.18 = 683.58 : x
  2. Step 2: Convert to fraction form
    963.84/1,329.18 = 683.58/x
  3. Step 3: Cross multiply
    963.84x = 1,329.18 × 683.58
  4. Step 4: Simplify right side
    963.84x = 908,600.86
  5. Step 5: Solve for x
    x = 908,600.86/963.84
  6. Step 6: Final answer
    x = 942.69

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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.