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Finding the Fourth Proportional to 378,992.80, 568,445.10 and 98,531.92

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Solution

The fourth proportional to 378,992.80, 568,445.10 and 98,531.92 is: 147,786.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,992.80 : 568,445.10 = 98,531.92 : x
  2. Step 2: Convert to fraction form
    378,992.80/568,445.10 = 98,531.92/x
  3. Step 3: Cross multiply
    378,992.80x = 568,445.10 × 98,531.92
  4. Step 4: Simplify right side
    378,992.80x = 56,009,987,117.59
  5. Step 5: Solve for x
    x = 56,009,987,117.59/378,992.80
  6. Step 6: Final answer
    x = 147,786.41

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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.