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Finding the Fourth Proportional to 325,686.79, 489,281.06 and 312,234.85

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Solution

The fourth proportional to 325,686.79, 489,281.06 and 312,234.85 is: 469,072.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,686.79 : 489,281.06 = 312,234.85 : x
  2. Step 2: Convert to fraction form
    325,686.79/489,281.06 = 312,234.85/x
  3. Step 3: Cross multiply
    325,686.79x = 489,281.06 × 312,234.85
  4. Step 4: Simplify right side
    325,686.79x = 152,770,598,376.94
  5. Step 5: Solve for x
    x = 152,770,598,376.94/325,686.79
  6. Step 6: Final answer
    x = 469,072.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.