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Finding the Fourth Proportional to 555.76, 766.83 and 422.96

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Solution

The fourth proportional to 555.76, 766.83 and 422.96 is: 583.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.76 : 766.83 = 422.96 : x
  2. Step 2: Convert to fraction form
    555.76/766.83 = 422.96/x
  3. Step 3: Cross multiply
    555.76x = 766.83 × 422.96
  4. Step 4: Simplify right side
    555.76x = 324,336.17
  5. Step 5: Solve for x
    x = 324,336.17/555.76
  6. Step 6: Final answer
    x = 583.59

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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.