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Finding the Fourth Proportional to 489,487.78, 675,482.67 and 271,683.77

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Solution

The fourth proportional to 489,487.78, 675,482.67 and 271,683.77 is: 374,917.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,487.78 : 675,482.67 = 271,683.77 : x
  2. Step 2: Convert to fraction form
    489,487.78/675,482.67 = 271,683.77/x
  3. Step 3: Cross multiply
    489,487.78x = 675,482.67 × 271,683.77
  4. Step 4: Simplify right side
    489,487.78x = 183,517,678,355.27
  5. Step 5: Solve for x
    x = 183,517,678,355.27/489,487.78
  6. Step 6: Final answer
    x = 374,917.79

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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.