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Finding the Fourth Proportional to 408,432.06, 612,668.16 and 108,915.36

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Solution

The fourth proportional to 408,432.06, 612,668.16 and 108,915.36 is: 163,378.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,432.06 : 612,668.16 = 108,915.36 : x
  2. Step 2: Convert to fraction form
    408,432.06/612,668.16 = 108,915.36/x
  3. Step 3: Cross multiply
    408,432.06x = 612,668.16 × 108,915.36
  4. Step 4: Simplify right side
    408,432.06x = 66,728,973,206.94
  5. Step 5: Solve for x
    x = 66,728,973,206.94/408,432.06
  6. Step 6: Final answer
    x = 163,378.39

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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.