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Finding the Fourth Proportional to 316,222.65, 436,383.72 and 172,980.97

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Solution

The fourth proportional to 316,222.65, 436,383.72 and 172,980.97 is: 238,711.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,222.65 : 436,383.72 = 172,980.97 : x
  2. Step 2: Convert to fraction form
    316,222.65/436,383.72 = 172,980.97/x
  3. Step 3: Cross multiply
    316,222.65x = 436,383.72 × 172,980.97
  4. Step 4: Simplify right side
    316,222.65x = 75,486,078,086.85
  5. Step 5: Solve for x
    x = 75,486,078,086.85/316,222.65
  6. Step 6: Final answer
    x = 238,711.80

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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.