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Finding the Fourth Proportional to 325,679.40, 488,519.10 and 115,247.40

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Solution

The fourth proportional to 325,679.40, 488,519.10 and 115,247.40 is: 172,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,679.40 : 488,519.10 = 115,247.40 : x
  2. Step 2: Convert to fraction form
    325,679.40/488,519.10 = 115,247.40/x
  3. Step 3: Cross multiply
    325,679.40x = 488,519.10 × 115,247.40
  4. Step 4: Simplify right side
    325,679.40x = 56,300,556,125.34
  5. Step 5: Solve for x
    x = 56,300,556,125.34/325,679.40
  6. Step 6: Final answer
    x = 172,871.10

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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.