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Finding the Fourth Proportional to 1,686.86, 2,530.58 and 516.83

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Solution

The fourth proportional to 1,686.86, 2,530.58 and 516.83 is: 775.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.86 : 2,530.58 = 516.83 : x
  2. Step 2: Convert to fraction form
    1,686.86/2,530.58 = 516.83/x
  3. Step 3: Cross multiply
    1,686.86x = 2,530.58 × 516.83
  4. Step 4: Simplify right side
    1,686.86x = 1,307,880.84
  5. Step 5: Solve for x
    x = 1,307,880.84/1,686.86
  6. Step 6: Final answer
    x = 775.33

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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.