Home / 1,210.20-1,814.40-516.30

Finding the Fourth Proportional to 1,210.20, 1,814.40 and 516.30

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Solution

The fourth proportional to 1,210.20, 1,814.40 and 516.30 is: 774.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.20 : 1,814.40 = 516.30 : x
  2. Step 2: Convert to fraction form
    1,210.20/1,814.40 = 516.30/x
  3. Step 3: Cross multiply
    1,210.20x = 1,814.40 × 516.30
  4. Step 4: Simplify right side
    1,210.20x = 936,774.72
  5. Step 5: Solve for x
    x = 936,774.72/1,210.20
  6. Step 6: Final answer
    x = 774.07

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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.