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Finding the Fourth Proportional to 440,455, 660,682.50 and 108,031

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Solution

The fourth proportional to 440,455, 660,682.50 and 108,031 is: 162,046.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,455 : 660,682.50 = 108,031 : x
  2. Step 2: Convert to fraction form
    440,455/660,682.50 = 108,031/x
  3. Step 3: Cross multiply
    440,455x = 660,682.50 × 108,031
  4. Step 4: Simplify right side
    440,455x = 71,374,191,157.50
  5. Step 5: Solve for x
    x = 71,374,191,157.50/440,455
  6. Step 6: Final answer
    x = 162,046.50

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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.