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Finding the Fourth Proportional to 880.92, 1,318.95 and 663.84

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Solution

The fourth proportional to 880.92, 1,318.95 and 663.84 is: 993.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.92 : 1,318.95 = 663.84 : x
  2. Step 2: Convert to fraction form
    880.92/1,318.95 = 663.84/x
  3. Step 3: Cross multiply
    880.92x = 1,318.95 × 663.84
  4. Step 4: Simplify right side
    880.92x = 875,571.77
  5. Step 5: Solve for x
    x = 875,571.77/880.92
  6. Step 6: Final answer
    x = 993.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.