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Finding the Fourth Proportional to 354,479.37, 489,345.35 and 218,537.61

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Solution

The fourth proportional to 354,479.37, 489,345.35 and 218,537.61 is: 301,682.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,479.37 : 489,345.35 = 218,537.61 : x
  2. Step 2: Convert to fraction form
    354,479.37/489,345.35 = 218,537.61/x
  3. Step 3: Cross multiply
    354,479.37x = 489,345.35 × 218,537.61
  4. Step 4: Simplify right side
    354,479.37x = 106,940,363,253.61
  5. Step 5: Solve for x
    x = 106,940,363,253.61/354,479.37
  6. Step 6: Final answer
    x = 301,682.90

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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.