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Finding the Fourth Proportional to 888.64, 1,226.14 and 678.44

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Solution

The fourth proportional to 888.64, 1,226.14 and 678.44 is: 936.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.64 : 1,226.14 = 678.44 : x
  2. Step 2: Convert to fraction form
    888.64/1,226.14 = 678.44/x
  3. Step 3: Cross multiply
    888.64x = 1,226.14 × 678.44
  4. Step 4: Simplify right side
    888.64x = 831,863.79
  5. Step 5: Solve for x
    x = 831,863.79/888.64
  6. Step 6: Final answer
    x = 936.11

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1.5x scale

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.