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Finding the Fourth Proportional to 888.95, 1,333.56 and 426.65

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Solution

The fourth proportional to 888.95, 1,333.56 and 426.65 is: 640.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.95 : 1,333.56 = 426.65 : x
  2. Step 2: Convert to fraction form
    888.95/1,333.56 = 426.65/x
  3. Step 3: Cross multiply
    888.95x = 1,333.56 × 426.65
  4. Step 4: Simplify right side
    888.95x = 568,956.71
  5. Step 5: Solve for x
    x = 568,956.71/888.95
  6. Step 6: Final answer
    x = 640.03

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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.