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Finding the Fourth Proportional to 385,175.88, 531,540.90 and 215,410.68

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Solution

The fourth proportional to 385,175.88, 531,540.90 and 215,410.68 is: 297,265.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,175.88 : 531,540.90 = 215,410.68 : x
  2. Step 2: Convert to fraction form
    385,175.88/531,540.90 = 215,410.68/x
  3. Step 3: Cross multiply
    385,175.88x = 531,540.90 × 215,410.68
  4. Step 4: Simplify right side
    385,175.88x = 114,499,586,716.81
  5. Step 5: Solve for x
    x = 114,499,586,716.81/385,175.88
  6. Step 6: Final answer
    x = 297,265.72

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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.