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Finding the Fourth Proportional to 489,801.21, 734,562.69 and 190,217.85

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Solution

The fourth proportional to 489,801.21, 734,562.69 and 190,217.85 is: 285,272.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,801.21 : 734,562.69 = 190,217.85 : x
  2. Step 2: Convert to fraction form
    489,801.21/734,562.69 = 190,217.85/x
  3. Step 3: Cross multiply
    489,801.21x = 734,562.69 × 190,217.85
  4. Step 4: Simplify right side
    489,801.21x = 139,726,935,582.02
  5. Step 5: Solve for x
    x = 139,726,935,582.02/489,801.21
  6. Step 6: Final answer
    x = 285,272.74

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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.