Home / 1,210.98-1,815.09-516.63

Finding the Fourth Proportional to 1,210.98, 1,815.09 and 516.63

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Solution

The fourth proportional to 1,210.98, 1,815.09 and 516.63 is: 774.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.98 : 1,815.09 = 516.63 : x
  2. Step 2: Convert to fraction form
    1,210.98/1,815.09 = 516.63/x
  3. Step 3: Cross multiply
    1,210.98x = 1,815.09 × 516.63
  4. Step 4: Simplify right side
    1,210.98x = 937,729.95
  5. Step 5: Solve for x
    x = 937,729.95/1,210.98
  6. Step 6: Final answer
    x = 774.36

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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.