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Finding the Fourth Proportional to 888.43, 1,226.13 and 515.39

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Solution

The fourth proportional to 888.43, 1,226.13 and 515.39 is: 711.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.43 : 1,226.13 = 515.39 : x
  2. Step 2: Convert to fraction form
    888.43/1,226.13 = 515.39/x
  3. Step 3: Cross multiply
    888.43x = 1,226.13 × 515.39
  4. Step 4: Simplify right side
    888.43x = 631,935.14
  5. Step 5: Solve for x
    x = 631,935.14/888.43
  6. Step 6: Final answer
    x = 711.29

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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.