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Finding the Fourth Proportional to 888.45, 1,332.81 and 426.14

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Solution

The fourth proportional to 888.45, 1,332.81 and 426.14 is: 639.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.45 : 1,332.81 = 426.14 : x
  2. Step 2: Convert to fraction form
    888.45/1,332.81 = 426.14/x
  3. Step 3: Cross multiply
    888.45x = 1,332.81 × 426.14
  4. Step 4: Simplify right side
    888.45x = 567,966.99
  5. Step 5: Solve for x
    x = 567,966.99/888.45
  6. Step 6: Final answer
    x = 639.28

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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.