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Finding the Fourth Proportional to 489,871.29, 676,021.88 and 275,011.77

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Solution

The fourth proportional to 489,871.29, 676,021.88 and 275,011.77 is: 379,515.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,871.29 : 676,021.88 = 275,011.77 : x
  2. Step 2: Convert to fraction form
    489,871.29/676,021.88 = 275,011.77/x
  3. Step 3: Cross multiply
    489,871.29x = 676,021.88 × 275,011.77
  4. Step 4: Simplify right side
    489,871.29x = 185,913,972,402.47
  5. Step 5: Solve for x
    x = 185,913,972,402.47/489,871.29
  6. Step 6: Final answer
    x = 379,515.96

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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.