Home / 1,332.14-1,998.20-407.69

Finding the Fourth Proportional to 1,332.14, 1,998.20 and 407.69

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Solution

The fourth proportional to 1,332.14, 1,998.20 and 407.69 is: 611.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.14 : 1,998.20 = 407.69 : x
  2. Step 2: Convert to fraction form
    1,332.14/1,998.20 = 407.69/x
  3. Step 3: Cross multiply
    1,332.14x = 1,998.20 × 407.69
  4. Step 4: Simplify right side
    1,332.14x = 814,634.13
  5. Step 5: Solve for x
    x = 814,634.13/1,332.14
  6. Step 6: Final answer
    x = 611.53

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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.