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Finding the Fourth Proportional to 323,075.20, 485,131.20 and 218,358.40

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Solution

The fourth proportional to 323,075.20, 485,131.20 and 218,358.40 is: 327,887.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,075.20 : 485,131.20 = 218,358.40 : x
  2. Step 2: Convert to fraction form
    323,075.20/485,131.20 = 218,358.40/x
  3. Step 3: Cross multiply
    323,075.20x = 485,131.20 × 218,358.40
  4. Step 4: Simplify right side
    323,075.20x = 105,932,472,622.08
  5. Step 5: Solve for x
    x = 105,932,472,622.08/323,075.20
  6. Step 6: Final answer
    x = 327,887.97

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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.