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Finding the Fourth Proportional to 316,188.91, 436,331.46 and 172,945.90

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Solution

The fourth proportional to 316,188.91, 436,331.46 and 172,945.90 is: 238,660.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,188.91 : 436,331.46 = 172,945.90 : x
  2. Step 2: Convert to fraction form
    316,188.91/436,331.46 = 172,945.90/x
  3. Step 3: Cross multiply
    316,188.91x = 436,331.46 × 172,945.90
  4. Step 4: Simplify right side
    316,188.91x = 75,461,737,048.01
  5. Step 5: Solve for x
    x = 75,461,737,048.01/316,188.91
  6. Step 6: Final answer
    x = 238,660.29

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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.