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Finding the Fourth Proportional to 518.41, 714.95 and 515.83

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Solution

The fourth proportional to 518.41, 714.95 and 515.83 is: 711.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.41 : 714.95 = 515.83 : x
  2. Step 2: Convert to fraction form
    518.41/714.95 = 515.83/x
  3. Step 3: Cross multiply
    518.41x = 714.95 × 515.83
  4. Step 4: Simplify right side
    518.41x = 368,786.50
  5. Step 5: Solve for x
    x = 368,786.50/518.41
  6. Step 6: Final answer
    x = 711.38

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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.