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Finding the Fourth Proportional to 213,428.80, 320,920.80 and 179,214.40

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Solution

The fourth proportional to 213,428.80, 320,920.80 and 179,214.40 is: 269,474.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,428.80 : 320,920.80 = 179,214.40 : x
  2. Step 2: Convert to fraction form
    213,428.80/320,920.80 = 179,214.40/x
  3. Step 3: Cross multiply
    213,428.80x = 320,920.80 × 179,214.40
  4. Step 4: Simplify right side
    213,428.80x = 57,513,628,619.52
  5. Step 5: Solve for x
    x = 57,513,628,619.52/213,428.80
  6. Step 6: Final answer
    x = 269,474.54

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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.