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Finding the Fourth Proportional to 257,693.96, 386,553.08 and 212,631.72

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Solution

The fourth proportional to 257,693.96, 386,553.08 and 212,631.72 is: 318,957.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,693.96 : 386,553.08 = 212,631.72 : x
  2. Step 2: Convert to fraction form
    257,693.96/386,553.08 = 212,631.72/x
  3. Step 3: Cross multiply
    257,693.96x = 386,553.08 × 212,631.72
  4. Step 4: Simplify right side
    257,693.96x = 82,193,446,271.70
  5. Step 5: Solve for x
    x = 82,193,446,271.70/257,693.96
  6. Step 6: Final answer
    x = 318,957.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.