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Finding the Fourth Proportional to 312,050.28, 430,629 and 168,810

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Solution

The fourth proportional to 312,050.28, 430,629 and 168,810 is: 232,957.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,050.28 : 430,629 = 168,810 : x
  2. Step 2: Convert to fraction form
    312,050.28/430,629 = 168,810/x
  3. Step 3: Cross multiply
    312,050.28x = 430,629 × 168,810
  4. Step 4: Simplify right side
    312,050.28x = 72,694,481,490
  5. Step 5: Solve for x
    x = 72,694,481,490/312,050.28
  6. Step 6: Final answer
    x = 232,957.59

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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.