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Finding the Fourth Proportional to 439,809.70, 659,628.15 and 144,321.70

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Solution

The fourth proportional to 439,809.70, 659,628.15 and 144,321.70 is: 216,454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,809.70 : 659,628.15 = 144,321.70 : x
  2. Step 2: Convert to fraction form
    439,809.70/659,628.15 = 144,321.70/x
  3. Step 3: Cross multiply
    439,809.70x = 659,628.15 × 144,321.70
  4. Step 4: Simplify right side
    439,809.70x = 95,198,655,975.86
  5. Step 5: Solve for x
    x = 95,198,655,975.86/439,809.70
  6. Step 6: Final answer
    x = 216,454.20

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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.