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Finding the Fourth Proportional to 888.45, 1,226.10 and 515.43

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Solution

The fourth proportional to 888.45, 1,226.10 and 515.43 is: 711.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.45 : 1,226.10 = 515.43 : x
  2. Step 2: Convert to fraction form
    888.45/1,226.10 = 515.43/x
  3. Step 3: Cross multiply
    888.45x = 1,226.10 × 515.43
  4. Step 4: Simplify right side
    888.45x = 631,968.72
  5. Step 5: Solve for x
    x = 631,968.72/888.45
  6. Step 6: Final answer
    x = 711.32

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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.