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Finding the Fourth Proportional to 298,090.60, 447,135.90 and 84,858.10

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Solution

The fourth proportional to 298,090.60, 447,135.90 and 84,858.10 is: 127,287.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,090.60 : 447,135.90 = 84,858.10 : x
  2. Step 2: Convert to fraction form
    298,090.60/447,135.90 = 84,858.10/x
  3. Step 3: Cross multiply
    298,090.60x = 447,135.90 × 84,858.10
  4. Step 4: Simplify right side
    298,090.60x = 37,943,102,915.79
  5. Step 5: Solve for x
    x = 37,943,102,915.79/298,090.60
  6. Step 6: Final answer
    x = 127,287.15

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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.