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Finding the Fourth Proportional to 489,122.88, 674,989.59 and 274,262.95

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Solution

The fourth proportional to 489,122.88, 674,989.59 and 274,262.95 is: 378,482.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,122.88 : 674,989.59 = 274,262.95 : x
  2. Step 2: Convert to fraction form
    489,122.88/674,989.59 = 274,262.95/x
  3. Step 3: Cross multiply
    489,122.88x = 674,989.59 × 274,262.95
  4. Step 4: Simplify right side
    489,122.88x = 185,124,636,172.69
  5. Step 5: Solve for x
    x = 185,124,636,172.69/489,122.88
  6. Step 6: Final answer
    x = 378,482.88

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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.