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Finding the Fourth Proportional to 368,990.25, 553,660.32 and 219,525.81

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Solution

The fourth proportional to 368,990.25, 553,660.32 and 219,525.81 is: 329,392.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,990.25 : 553,660.32 = 219,525.81 : x
  2. Step 2: Convert to fraction form
    368,990.25/553,660.32 = 219,525.81/x
  3. Step 3: Cross multiply
    368,990.25x = 553,660.32 × 219,525.81
  4. Step 4: Simplify right side
    368,990.25x = 121,542,730,212.86
  5. Step 5: Solve for x
    x = 121,542,730,212.86/368,990.25
  6. Step 6: Final answer
    x = 329,392.80

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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.