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Finding the Fourth Proportional to 408,573.56, 612,860.36 and 128,113.40

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Solution

The fourth proportional to 408,573.56, 612,860.36 and 128,113.40 is: 192,170.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,573.56 : 612,860.36 = 128,113.40 : x
  2. Step 2: Convert to fraction form
    408,573.56/612,860.36 = 128,113.40/x
  3. Step 3: Cross multiply
    408,573.56x = 612,860.36 × 128,113.40
  4. Step 4: Simplify right side
    408,573.56x = 78,515,624,444.82
  5. Step 5: Solve for x
    x = 78,515,624,444.82/408,573.56
  6. Step 6: Final answer
    x = 192,170.11

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1.5x scale

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.