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Finding the Fourth Proportional to 279,142.58, 385,218.58 and 151,819.10

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Solution

The fourth proportional to 279,142.58, 385,218.58 and 151,819.10 is: 209,511.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,142.58 : 385,218.58 = 151,819.10 : x
  2. Step 2: Convert to fraction form
    279,142.58/385,218.58 = 151,819.10/x
  3. Step 3: Cross multiply
    279,142.58x = 385,218.58 × 151,819.10
  4. Step 4: Simplify right side
    279,142.58x = 58,483,538,118.88
  5. Step 5: Solve for x
    x = 58,483,538,118.88/279,142.58
  6. Step 6: Final answer
    x = 209,511.35

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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.