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Finding the Fourth Proportional to 555.54, 765.04 and 553.86

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Solution

The fourth proportional to 555.54, 765.04 and 553.86 is: 762.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.54 : 765.04 = 553.86 : x
  2. Step 2: Convert to fraction form
    555.54/765.04 = 553.86/x
  3. Step 3: Cross multiply
    555.54x = 765.04 × 553.86
  4. Step 4: Simplify right side
    555.54x = 423,725.05
  5. Step 5: Solve for x
    x = 423,725.05/555.54
  6. Step 6: Final answer
    x = 762.73

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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.