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Finding the Fourth Proportional to 517.95, 714.39 and 486.09

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Solution

The fourth proportional to 517.95, 714.39 and 486.09 is: 670.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.95 : 714.39 = 486.09 : x
  2. Step 2: Convert to fraction form
    517.95/714.39 = 486.09/x
  3. Step 3: Cross multiply
    517.95x = 714.39 × 486.09
  4. Step 4: Simplify right side
    517.95x = 347,257.84
  5. Step 5: Solve for x
    x = 347,257.84/517.95
  6. Step 6: Final answer
    x = 670.45

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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.