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Finding the Fourth Proportional to 251,228.20, 377,456.70 and 189,020.20

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Solution

The fourth proportional to 251,228.20, 377,456.70 and 189,020.20 is: 283,992.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,228.20 : 377,456.70 = 189,020.20 : x
  2. Step 2: Convert to fraction form
    251,228.20/377,456.70 = 189,020.20/x
  3. Step 3: Cross multiply
    251,228.20x = 377,456.70 × 189,020.20
  4. Step 4: Simplify right side
    251,228.20x = 71,346,940,925.34
  5. Step 5: Solve for x
    x = 71,346,940,925.34/251,228.20
  6. Step 6: Final answer
    x = 283,992.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.