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Finding the Fourth Proportional to 298,008.39, 447,012.45 and 87,646.33

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Solution

The fourth proportional to 298,008.39, 447,012.45 and 87,646.33 is: 131,469.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,008.39 : 447,012.45 = 87,646.33 : x
  2. Step 2: Convert to fraction form
    298,008.39/447,012.45 = 87,646.33/x
  3. Step 3: Cross multiply
    298,008.39x = 447,012.45 × 87,646.33
  4. Step 4: Simplify right side
    298,008.39x = 39,179,000,706.81
  5. Step 5: Solve for x
    x = 39,179,000,706.81/298,008.39
  6. Step 6: Final answer
    x = 131,469.46

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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.