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Finding the Fourth Proportional to 231,421.50, 318,790.80 and 197,318.88

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Solution

The fourth proportional to 231,421.50, 318,790.80 and 197,318.88 is: 271,813.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,421.50 : 318,790.80 = 197,318.88 : x
  2. Step 2: Convert to fraction form
    231,421.50/318,790.80 = 197,318.88/x
  3. Step 3: Cross multiply
    231,421.50x = 318,790.80 × 197,318.88
  4. Step 4: Simplify right side
    231,421.50x = 62,903,443,610.30
  5. Step 5: Solve for x
    x = 62,903,443,610.30/231,421.50
  6. Step 6: Final answer
    x = 271,813.31

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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.