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Finding the Fourth Proportional to 489,710.69, 675,800.76 and 274,850.76

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Solution

The fourth proportional to 489,710.69, 675,800.76 and 274,850.76 is: 379,294.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,710.69 : 675,800.76 = 274,850.76 : x
  2. Step 2: Convert to fraction form
    489,710.69/675,800.76 = 274,850.76/x
  3. Step 3: Cross multiply
    489,710.69x = 675,800.76 × 274,850.76
  4. Step 4: Simplify right side
    489,710.69x = 185,744,352,494.58
  5. Step 5: Solve for x
    x = 185,744,352,494.58/489,710.69
  6. Step 6: Final answer
    x = 379,294.05

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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.