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Finding the Fourth Proportional to 316,199.94, 436,346.64 and 172,956.90

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Solution

The fourth proportional to 316,199.94, 436,346.64 and 172,956.90 is: 238,675.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,199.94 : 436,346.64 = 172,956.90 : x
  2. Step 2: Convert to fraction form
    316,199.94/436,346.64 = 172,956.90/x
  3. Step 3: Cross multiply
    316,199.94x = 436,346.64 × 172,956.90
  4. Step 4: Simplify right side
    316,199.94x = 75,469,162,179.82
  5. Step 5: Solve for x
    x = 75,469,162,179.82/316,199.94
  6. Step 6: Final answer
    x = 238,675.45

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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.