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Finding the Fourth Proportional to 888.97, 1,226.59 and 515.90

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Solution

The fourth proportional to 888.97, 1,226.59 and 515.90 is: 711.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.97 : 1,226.59 = 515.90 : x
  2. Step 2: Convert to fraction form
    888.97/1,226.59 = 515.90/x
  3. Step 3: Cross multiply
    888.97x = 1,226.59 × 515.90
  4. Step 4: Simplify right side
    888.97x = 632,792.14
  5. Step 5: Solve for x
    x = 632,792.14/888.97
  6. Step 6: Final answer
    x = 711.83

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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.