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Finding the Fourth Proportional to 321,989.32, 444,396.18 and 307,813.96

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Solution

The fourth proportional to 321,989.32, 444,396.18 and 307,813.96 is: 424,831.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,989.32 : 444,396.18 = 307,813.96 : x
  2. Step 2: Convert to fraction form
    321,989.32/444,396.18 = 307,813.96/x
  3. Step 3: Cross multiply
    321,989.32x = 444,396.18 × 307,813.96
  4. Step 4: Simplify right side
    321,989.32x = 136,791,347,974.67
  5. Step 5: Solve for x
    x = 136,791,347,974.67/321,989.32
  6. Step 6: Final answer
    x = 424,831.94

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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.