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Finding the Fourth Proportional to 408,108.02, 612,225.41 and 208,320.30

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Solution

The fourth proportional to 408,108.02, 612,225.41 and 208,320.30 is: 312,512.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,108.02 : 612,225.41 = 208,320.30 : x
  2. Step 2: Convert to fraction form
    408,108.02/612,225.41 = 208,320.30/x
  3. Step 3: Cross multiply
    408,108.02x = 612,225.41 × 208,320.30
  4. Step 4: Simplify right side
    408,108.02x = 127,538,981,078.82
  5. Step 5: Solve for x
    x = 127,538,981,078.82/408,108.02
  6. Step 6: Final answer
    x = 312,512.80

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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.