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Finding the Fourth Proportional to 307,221.63, 460,910.20 and 85,605.63

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Solution

The fourth proportional to 307,221.63, 460,910.20 and 85,605.63 is: 128,430.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,221.63 : 460,910.20 = 85,605.63 : x
  2. Step 2: Convert to fraction form
    307,221.63/460,910.20 = 85,605.63/x
  3. Step 3: Cross multiply
    307,221.63x = 460,910.20 × 85,605.63
  4. Step 4: Simplify right side
    307,221.63x = 39,456,508,044.43
  5. Step 5: Solve for x
    x = 39,456,508,044.43/307,221.63
  6. Step 6: Final answer
    x = 128,430.11

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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.