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Finding the Fourth Proportional to 555.29, 765.86 and 518.03

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Solution

The fourth proportional to 555.29, 765.86 and 518.03 is: 714.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.29 : 765.86 = 518.03 : x
  2. Step 2: Convert to fraction form
    555.29/765.86 = 518.03/x
  3. Step 3: Cross multiply
    555.29x = 765.86 × 518.03
  4. Step 4: Simplify right side
    555.29x = 396,741.67
  5. Step 5: Solve for x
    x = 396,741.67/555.29
  6. Step 6: Final answer
    x = 714.47

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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.