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Finding the Fourth Proportional to 321,991.32, 444,398.94 and 307,815.96

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Solution

The fourth proportional to 321,991.32, 444,398.94 and 307,815.96 is: 424,834.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,991.32 : 444,398.94 = 307,815.96 : x
  2. Step 2: Convert to fraction form
    321,991.32/444,398.94 = 307,815.96/x
  3. Step 3: Cross multiply
    321,991.32x = 444,398.94 × 307,815.96
  4. Step 4: Simplify right side
    321,991.32x = 136,793,086,339.08
  5. Step 5: Solve for x
    x = 136,793,086,339.08/321,991.32
  6. Step 6: Final answer
    x = 424,834.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.