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Finding the Fourth Proportional to 354,478.87, 489,344.66 and 218,537.11

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Solution

The fourth proportional to 354,478.87, 489,344.66 and 218,537.11 is: 301,682.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,478.87 : 489,344.66 = 218,537.11 : x
  2. Step 2: Convert to fraction form
    354,478.87/489,344.66 = 218,537.11/x
  3. Step 3: Cross multiply
    354,478.87x = 489,344.66 × 218,537.11
  4. Step 4: Simplify right side
    354,478.87x = 106,939,966,697.65
  5. Step 5: Solve for x
    x = 106,939,966,697.65/354,478.87
  6. Step 6: Final answer
    x = 301,682.20

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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.