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Finding the Fourth Proportional to 555.39, 765.86 and 358.56

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Solution

The fourth proportional to 555.39, 765.86 and 358.56 is: 494.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.39 : 765.86 = 358.56 : x
  2. Step 2: Convert to fraction form
    555.39/765.86 = 358.56/x
  3. Step 3: Cross multiply
    555.39x = 765.86 × 358.56
  4. Step 4: Simplify right side
    555.39x = 274,604.97
  5. Step 5: Solve for x
    x = 274,604.97/555.39
  6. Step 6: Final answer
    x = 494.44

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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.