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Finding the Fourth Proportional to 518.00, 714.82 and 281.95

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Solution

The fourth proportional to 518.00, 714.82 and 281.95 is: 389.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.00 : 714.82 = 281.95 : x
  2. Step 2: Convert to fraction form
    518.00/714.82 = 281.95/x
  3. Step 3: Cross multiply
    518.00x = 714.82 × 281.95
  4. Step 4: Simplify right side
    518.00x = 201,542.42
  5. Step 5: Solve for x
    x = 201,542.42/518.00
  6. Step 6: Final answer
    x = 389.08

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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.