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Finding the Fourth Proportional to 316,995.41, 475,495 and 80,338.79

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Solution

The fourth proportional to 316,995.41, 475,495 and 80,338.79 is: 120,508.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,995.41 : 475,495 = 80,338.79 : x
  2. Step 2: Convert to fraction form
    316,995.41/475,495 = 80,338.79/x
  3. Step 3: Cross multiply
    316,995.41x = 475,495 × 80,338.79
  4. Step 4: Simplify right side
    316,995.41x = 38,200,692,951.05
  5. Step 5: Solve for x
    x = 38,200,692,951.05/316,995.41
  6. Step 6: Final answer
    x = 120,508.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.