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Finding the Fourth Proportional to 393,630.72, 589,984.32 and 169,112.64

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Solution

The fourth proportional to 393,630.72, 589,984.32 and 169,112.64 is: 253,470.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,630.72 : 589,984.32 = 169,112.64 : x
  2. Step 2: Convert to fraction form
    393,630.72/589,984.32 = 169,112.64/x
  3. Step 3: Cross multiply
    393,630.72x = 589,984.32 × 169,112.64
  4. Step 4: Simplify right side
    393,630.72x = 99,773,805,913.80
  5. Step 5: Solve for x
    x = 99,773,805,913.80/393,630.72
  6. Step 6: Final answer
    x = 253,470.58

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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.