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Finding the Fourth Proportional to 213,640.80, 320,072.40 and 173,983.20

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Solution

The fourth proportional to 213,640.80, 320,072.40 and 173,983.20 is: 260,658.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,640.80 : 320,072.40 = 173,983.20 : x
  2. Step 2: Convert to fraction form
    213,640.80/320,072.40 = 173,983.20/x
  3. Step 3: Cross multiply
    213,640.80x = 320,072.40 × 173,983.20
  4. Step 4: Simplify right side
    213,640.80x = 55,687,220,383.68
  5. Step 5: Solve for x
    x = 55,687,220,383.68/213,640.80
  6. Step 6: Final answer
    x = 260,658.17

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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.