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Finding the Fourth Proportional to 298,335.79, 447,435.33 and 85,099.66

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Solution

The fourth proportional to 298,335.79, 447,435.33 and 85,099.66 is: 127,629.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,335.79 : 447,435.33 = 85,099.66 : x
  2. Step 2: Convert to fraction form
    298,335.79/447,435.33 = 85,099.66/x
  3. Step 3: Cross multiply
    298,335.79x = 447,435.33 × 85,099.66
  4. Step 4: Simplify right side
    298,335.79x = 38,076,594,454.99
  5. Step 5: Solve for x
    x = 38,076,594,454.99/298,335.79
  6. Step 6: Final answer
    x = 127,629.99

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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.