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Finding the Fourth Proportional to 279,505.52, 385,675.68 and 156,993.20

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Solution

The fourth proportional to 279,505.52, 385,675.68 and 156,993.20 is: 216,627.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,505.52 : 385,675.68 = 156,993.20 : x
  2. Step 2: Convert to fraction form
    279,505.52/385,675.68 = 156,993.20/x
  3. Step 3: Cross multiply
    279,505.52x = 385,675.68 × 156,993.20
  4. Step 4: Simplify right side
    279,505.52x = 60,548,459,924.75
  5. Step 5: Solve for x
    x = 60,548,459,924.75/279,505.52
  6. Step 6: Final answer
    x = 216,627.06

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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.