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Finding the Fourth Proportional to 888.80, 1,226.56 and 515.84

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Solution

The fourth proportional to 888.80, 1,226.56 and 515.84 is: 711.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.80 : 1,226.56 = 515.84 : x
  2. Step 2: Convert to fraction form
    888.80/1,226.56 = 515.84/x
  3. Step 3: Cross multiply
    888.80x = 1,226.56 × 515.84
  4. Step 4: Simplify right side
    888.80x = 632,708.71
  5. Step 5: Solve for x
    x = 632,708.71/888.80
  6. Step 6: Final answer
    x = 711.87

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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.