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Finding the Fourth Proportional to 275,138.40, 379,848.30 and 210,488.52

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Solution

The fourth proportional to 275,138.40, 379,848.30 and 210,488.52 is: 290,594.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,138.40 : 379,848.30 = 210,488.52 : x
  2. Step 2: Convert to fraction form
    275,138.40/379,848.30 = 210,488.52/x
  3. Step 3: Cross multiply
    275,138.40x = 379,848.30 × 210,488.52
  4. Step 4: Simplify right side
    275,138.40x = 79,953,706,491.52
  5. Step 5: Solve for x
    x = 79,953,706,491.52/275,138.40
  6. Step 6: Final answer
    x = 290,594.50

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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.