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Finding the Fourth Proportional to 888.86, 1,226.77 and 678.64

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Solution

The fourth proportional to 888.86, 1,226.77 and 678.64 is: 936.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.86 : 1,226.77 = 678.64 : x
  2. Step 2: Convert to fraction form
    888.86/1,226.77 = 678.64/x
  3. Step 3: Cross multiply
    888.86x = 1,226.77 × 678.64
  4. Step 4: Simplify right side
    888.86x = 832,535.19
  5. Step 5: Solve for x
    x = 832,535.19/888.86
  6. Step 6: Final answer
    x = 936.63

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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.