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Finding the Fourth Proportional to 489,117.71, 674,981.82 and 271,359.42

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Solution

The fourth proportional to 489,117.71, 674,981.82 and 271,359.42 is: 374,475.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,117.71 : 674,981.82 = 271,359.42 : x
  2. Step 2: Convert to fraction form
    489,117.71/674,981.82 = 271,359.42/x
  3. Step 3: Cross multiply
    489,117.71x = 674,981.82 × 271,359.42
  4. Step 4: Simplify right side
    489,117.71x = 183,162,675,185.74
  5. Step 5: Solve for x
    x = 183,162,675,185.74/489,117.71
  6. Step 6: Final answer
    x = 374,475.65

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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.