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Finding the Fourth Proportional to 279,511.74, 385,706.70 and 158,655.51

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Solution

The fourth proportional to 279,511.74, 385,706.70 and 158,655.51 is: 218,933.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,511.74 : 385,706.70 = 158,655.51 : x
  2. Step 2: Convert to fraction form
    279,511.74/385,706.70 = 158,655.51/x
  3. Step 3: Cross multiply
    279,511.74x = 385,706.70 × 158,655.51
  4. Step 4: Simplify right side
    279,511.74x = 61,194,493,198.92
  5. Step 5: Solve for x
    x = 61,194,493,198.92/279,511.74
  6. Step 6: Final answer
    x = 218,933.53

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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.