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Finding the Fourth Proportional to 284,638.30, 426,826.20 and 84,906.88

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Solution

The fourth proportional to 284,638.30, 426,826.20 and 84,906.88 is: 127,321.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,638.30 : 426,826.20 = 84,906.88 : x
  2. Step 2: Convert to fraction form
    284,638.30/426,826.20 = 84,906.88/x
  3. Step 3: Cross multiply
    284,638.30x = 426,826.20 × 84,906.88
  4. Step 4: Simplify right side
    284,638.30x = 36,240,480,944.26
  5. Step 5: Solve for x
    x = 36,240,480,944.26/284,638.30
  6. Step 6: Final answer
    x = 127,321.17

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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.