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Finding the Fourth Proportional to 385,135.44, 531,477 and 213,059.88

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Solution

The fourth proportional to 385,135.44, 531,477 and 213,059.88 is: 294,017.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,135.44 : 531,477 = 213,059.88 : x
  2. Step 2: Convert to fraction form
    385,135.44/531,477 = 213,059.88/x
  3. Step 3: Cross multiply
    385,135.44x = 531,477 × 213,059.88
  4. Step 4: Simplify right side
    385,135.44x = 113,236,425,842.76
  5. Step 5: Solve for x
    x = 113,236,425,842.76/385,135.44
  6. Step 6: Final answer
    x = 294,017.15

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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.