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Finding the Fourth Proportional to 356,086.80, 491,629.23 and 317,780.82

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Solution

The fourth proportional to 356,086.80, 491,629.23 and 317,780.82 is: 438,742.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,086.80 : 491,629.23 = 317,780.82 : x
  2. Step 2: Convert to fraction form
    356,086.80/491,629.23 = 317,780.82/x
  3. Step 3: Cross multiply
    356,086.80x = 491,629.23 × 317,780.82
  4. Step 4: Simplify right side
    356,086.80x = 156,230,339,845.37
  5. Step 5: Solve for x
    x = 156,230,339,845.37/356,086.80
  6. Step 6: Final answer
    x = 438,742.29

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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.