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Finding the Fourth Proportional to 518.97, 777.83 and 210.74

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Solution

The fourth proportional to 518.97, 777.83 and 210.74 is: 315.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.97 : 777.83 = 210.74 : x
  2. Step 2: Convert to fraction form
    518.97/777.83 = 210.74/x
  3. Step 3: Cross multiply
    518.97x = 777.83 × 210.74
  4. Step 4: Simplify right side
    518.97x = 163,918.83
  5. Step 5: Solve for x
    x = 163,918.83/518.97
  6. Step 6: Final answer
    x = 315.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.