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Finding the Fourth Proportional to 439,825.40, 659,219.70 and 328,887.80

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Solution

The fourth proportional to 439,825.40, 659,219.70 and 328,887.80 is: 492,944.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,825.40 : 659,219.70 = 328,887.80 : x
  2. Step 2: Convert to fraction form
    439,825.40/659,219.70 = 328,887.80/x
  3. Step 3: Cross multiply
    439,825.40x = 659,219.70 × 328,887.80
  4. Step 4: Simplify right side
    439,825.40x = 216,809,316,849.66
  5. Step 5: Solve for x
    x = 216,809,316,849.66/439,825.40
  6. Step 6: Final answer
    x = 492,944.06

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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.