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Finding the Fourth Proportional to 279,605.59, 385,865.37 and 158,742.86

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Solution

The fourth proportional to 279,605.59, 385,865.37 and 158,742.86 is: 219,070.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,605.59 : 385,865.37 = 158,742.86 : x
  2. Step 2: Convert to fraction form
    279,605.59/385,865.37 = 158,742.86/x
  3. Step 3: Cross multiply
    279,605.59x = 385,865.37 × 158,742.86
  4. Step 4: Simplify right side
    279,605.59x = 61,253,370,479.43
  5. Step 5: Solve for x
    x = 61,253,370,479.43/279,605.59
  6. Step 6: Final answer
    x = 219,070.62

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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.