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Finding the Fourth Proportional to 303,578.40, 455,659.20 and 153,987.60

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Solution

The fourth proportional to 303,578.40, 455,659.20 and 153,987.60 is: 231,129.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,578.40 : 455,659.20 = 153,987.60 : x
  2. Step 2: Convert to fraction form
    303,578.40/455,659.20 = 153,987.60/x
  3. Step 3: Cross multiply
    303,578.40x = 455,659.20 × 153,987.60
  4. Step 4: Simplify right side
    303,578.40x = 70,165,866,625.92
  5. Step 5: Solve for x
    x = 70,165,866,625.92/303,578.40
  6. Step 6: Final answer
    x = 231,129.31

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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.