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Finding the Fourth Proportional to 439,603.20, 659,404.80 and 159,019.20

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Solution

The fourth proportional to 439,603.20, 659,404.80 and 159,019.20 is: 238,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,603.20 : 659,404.80 = 159,019.20 : x
  2. Step 2: Convert to fraction form
    439,603.20/659,404.80 = 159,019.20/x
  3. Step 3: Cross multiply
    439,603.20x = 659,404.80 × 159,019.20
  4. Step 4: Simplify right side
    439,603.20x = 104,858,023,772.16
  5. Step 5: Solve for x
    x = 104,858,023,772.16/439,603.20
  6. Step 6: Final answer
    x = 238,528.80

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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.