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Finding the Fourth Proportional to 385,471.12, 531,954.35 and 213,391.96

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Solution

The fourth proportional to 385,471.12, 531,954.35 and 213,391.96 is: 294,483.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,471.12 : 531,954.35 = 213,391.96 : x
  2. Step 2: Convert to fraction form
    385,471.12/531,954.35 = 213,391.96/x
  3. Step 3: Cross multiply
    385,471.12x = 531,954.35 × 213,391.96
  4. Step 4: Simplify right side
    385,471.12x = 113,514,781,576.60
  5. Step 5: Solve for x
    x = 113,514,781,576.60/385,471.12
  6. Step 6: Final answer
    x = 294,483.23

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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.