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Finding the Fourth Proportional to 315,288.30, 435,107.09 and 172,057.58

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Solution

The fourth proportional to 315,288.30, 435,107.09 and 172,057.58 is: 237,444.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,288.30 : 435,107.09 = 172,057.58 : x
  2. Step 2: Convert to fraction form
    315,288.30/435,107.09 = 172,057.58/x
  3. Step 3: Cross multiply
    315,288.30x = 435,107.09 × 172,057.58
  4. Step 4: Simplify right side
    315,288.30x = 74,863,469,910.42
  5. Step 5: Solve for x
    x = 74,863,469,910.42/315,288.30
  6. Step 6: Final answer
    x = 237,444.49

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1.5x scale

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.