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Finding the Fourth Proportional to 278,997.63, 385,000.38 and 151,672.11

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Solution

The fourth proportional to 278,997.63, 385,000.38 and 151,672.11 is: 209,298.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,997.63 : 385,000.38 = 151,672.11 : x
  2. Step 2: Convert to fraction form
    278,997.63/385,000.38 = 151,672.11/x
  3. Step 3: Cross multiply
    278,997.63x = 385,000.38 × 151,672.11
  4. Step 4: Simplify right side
    278,997.63x = 58,393,819,985.40
  5. Step 5: Solve for x
    x = 58,393,819,985.40/278,997.63
  6. Step 6: Final answer
    x = 209,298.62

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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.