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Finding the Fourth Proportional to 367,603.20, 551,404.80 and 145,987.20

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Solution

The fourth proportional to 367,603.20, 551,404.80 and 145,987.20 is: 218,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,603.20 : 551,404.80 = 145,987.20 : x
  2. Step 2: Convert to fraction form
    367,603.20/551,404.80 = 145,987.20/x
  3. Step 3: Cross multiply
    367,603.20x = 551,404.80 × 145,987.20
  4. Step 4: Simplify right side
    367,603.20x = 80,498,042,818.56
  5. Step 5: Solve for x
    x = 80,498,042,818.56/367,603.20
  6. Step 6: Final answer
    x = 218,980.80

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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.