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Finding the Fourth Proportional to 489,043, 674,881.19 and 285,234.67

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Solution

The fourth proportional to 489,043, 674,881.19 and 285,234.67 is: 393,624.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,043 : 674,881.19 = 285,234.67 : x
  2. Step 2: Convert to fraction form
    489,043/674,881.19 = 285,234.67/x
  3. Step 3: Cross multiply
    489,043x = 674,881.19 × 285,234.67
  4. Step 4: Simplify right side
    489,043x = 192,499,513,518.86
  5. Step 5: Solve for x
    x = 192,499,513,518.86/489,043
  6. Step 6: Final answer
    x = 393,624.92

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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.