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Finding the Fourth Proportional to 440,405.15, 660,711.15 and 136,783.80

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Solution

The fourth proportional to 440,405.15, 660,711.15 and 136,783.80 is: 205,207.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,405.15 : 660,711.15 = 136,783.80 : x
  2. Step 2: Convert to fraction form
    440,405.15/660,711.15 = 136,783.80/x
  3. Step 3: Cross multiply
    440,405.15x = 660,711.15 × 136,783.80
  4. Step 4: Simplify right side
    440,405.15x = 90,374,581,799.37
  5. Step 5: Solve for x
    x = 90,374,581,799.37/440,405.15
  6. Step 6: Final answer
    x = 205,207.82

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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.