Home / 1,147,987.60-1,721,911.68-428,190.55

Finding the Fourth Proportional to 1,147,987.60, 1,721,911.68 and 428,190.55

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Solution

The fourth proportional to 1,147,987.60, 1,721,911.68 and 428,190.55 is: 642,259.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147,987.60 : 1,721,911.68 = 428,190.55 : x
  2. Step 2: Convert to fraction form
    1,147,987.60/1,721,911.68 = 428,190.55/x
  3. Step 3: Cross multiply
    1,147,987.60x = 1,721,911.68 × 428,190.55
  4. Step 4: Simplify right side
    1,147,987.60x = 737,306,305,005.85
  5. Step 5: Solve for x
    x = 737,306,305,005.85/1,147,987.60
  6. Step 6: Final answer
    x = 642,259.82

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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.