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Finding the Fourth Proportional to 543,442.56, 815,166.54 and 318,644.88

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Solution

The fourth proportional to 543,442.56, 815,166.54 and 318,644.88 is: 477,968.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,442.56 : 815,166.54 = 318,644.88 : x
  2. Step 2: Convert to fraction form
    543,442.56/815,166.54 = 318,644.88/x
  3. Step 3: Cross multiply
    543,442.56x = 815,166.54 × 318,644.88
  4. Step 4: Simplify right side
    543,442.56x = 259,748,644,318.32
  5. Step 5: Solve for x
    x = 259,748,644,318.32/543,442.56
  6. Step 6: Final answer
    x = 477,968.90

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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.