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Finding the Fourth Proportional to 279,461.36, 385,709.80 and 158,613.96

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Solution

The fourth proportional to 279,461.36, 385,709.80 and 158,613.96 is: 218,917.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,461.36 : 385,709.80 = 158,613.96 : x
  2. Step 2: Convert to fraction form
    279,461.36/385,709.80 = 158,613.96/x
  3. Step 3: Cross multiply
    279,461.36x = 385,709.80 × 158,613.96
  4. Step 4: Simplify right side
    279,461.36x = 61,178,958,788.81
  5. Step 5: Solve for x
    x = 61,178,958,788.81/279,461.36
  6. Step 6: Final answer
    x = 218,917.42

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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.