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Finding the Fourth Proportional to 393,984, 591,179.04 and 216,630.72

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Solution

The fourth proportional to 393,984, 591,179.04 and 216,630.72 is: 325,057.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,984 : 591,179.04 = 216,630.72 : x
  2. Step 2: Convert to fraction form
    393,984/591,179.04 = 216,630.72/x
  3. Step 3: Cross multiply
    393,984x = 591,179.04 × 216,630.72
  4. Step 4: Simplify right side
    393,984x = 128,067,541,084.11
  5. Step 5: Solve for x
    x = 128,067,541,084.11/393,984
  6. Step 6: Final answer
    x = 325,057.72

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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.