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Finding the Fourth Proportional to 329,892.40, 455,253.78 and 178,989.40

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Solution

The fourth proportional to 329,892.40, 455,253.78 and 178,989.40 is: 247,006.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,892.40 : 455,253.78 = 178,989.40 : x
  2. Step 2: Convert to fraction form
    329,892.40/455,253.78 = 178,989.40/x
  3. Step 3: Cross multiply
    329,892.40x = 455,253.78 × 178,989.40
  4. Step 4: Simplify right side
    329,892.40x = 81,485,600,929.93
  5. Step 5: Solve for x
    x = 81,485,600,929.93/329,892.40
  6. Step 6: Final answer
    x = 247,006.60

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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.