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Finding the Fourth Proportional to 315,210.80, 434,974.92 and 171,969.68

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Solution

The fourth proportional to 315,210.80, 434,974.92 and 171,969.68 is: 237,309.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,210.80 : 434,974.92 = 171,969.68 : x
  2. Step 2: Convert to fraction form
    315,210.80/434,974.92 = 171,969.68/x
  3. Step 3: Cross multiply
    315,210.80x = 434,974.92 × 171,969.68
  4. Step 4: Simplify right side
    315,210.80x = 74,802,497,800.43
  5. Step 5: Solve for x
    x = 74,802,497,800.43/315,210.80
  6. Step 6: Final answer
    x = 237,309.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.