Home / 1,210.20-1,815.30-344.52

Finding the Fourth Proportional to 1,210.20, 1,815.30 and 344.52

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Solution

The fourth proportional to 1,210.20, 1,815.30 and 344.52 is: 516.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.20 : 1,815.30 = 344.52 : x
  2. Step 2: Convert to fraction form
    1,210.20/1,815.30 = 344.52/x
  3. Step 3: Cross multiply
    1,210.20x = 1,815.30 × 344.52
  4. Step 4: Simplify right side
    1,210.20x = 625,407.16
  5. Step 5: Solve for x
    x = 625,407.16/1,210.20
  6. Step 6: Final answer
    x = 516.78

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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.