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Finding the Fourth Proportional to 324,420.62, 444,448.83 and 312,291.30

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Solution

The fourth proportional to 324,420.62, 444,448.83 and 312,291.30 is: 427,831.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,420.62 : 444,448.83 = 312,291.30 : x
  2. Step 2: Convert to fraction form
    324,420.62/444,448.83 = 312,291.30/x
  3. Step 3: Cross multiply
    324,420.62x = 444,448.83 × 312,291.30
  4. Step 4: Simplify right side
    324,420.62x = 138,797,499,901.21
  5. Step 5: Solve for x
    x = 138,797,499,901.21/324,420.62
  6. Step 6: Final answer
    x = 427,831.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.