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Finding the Fourth Proportional to 440,912.34, 661,248.36 and 120,988.35

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Solution

The fourth proportional to 440,912.34, 661,248.36 and 120,988.35 is: 181,449.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,912.34 : 661,248.36 = 120,988.35 : x
  2. Step 2: Convert to fraction form
    440,912.34/661,248.36 = 120,988.35/x
  3. Step 3: Cross multiply
    440,912.34x = 661,248.36 × 120,988.35
  4. Step 4: Simplify right side
    440,912.34x = 80,003,348,016.61
  5. Step 5: Solve for x
    x = 80,003,348,016.61/440,912.34
  6. Step 6: Final answer
    x = 181,449.56

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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.