Home / 1,200.12-1,799.76-459.93

Finding the Fourth Proportional to 1,200.12, 1,799.76 and 459.93

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Solution

The fourth proportional to 1,200.12, 1,799.76 and 459.93 is: 689.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.12 : 1,799.76 = 459.93 : x
  2. Step 2: Convert to fraction form
    1,200.12/1,799.76 = 459.93/x
  3. Step 3: Cross multiply
    1,200.12x = 1,799.76 × 459.93
  4. Step 4: Simplify right side
    1,200.12x = 827,763.62
  5. Step 5: Solve for x
    x = 827,763.62/1,200.12
  6. Step 6: Final answer
    x = 689.73

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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.