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Finding the Fourth Proportional to 378,609.60, 567,136.80 and 191,726.40

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Solution

The fourth proportional to 378,609.60, 567,136.80 and 191,726.40 is: 287,195.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,609.60 : 567,136.80 = 191,726.40 : x
  2. Step 2: Convert to fraction form
    378,609.60/567,136.80 = 191,726.40/x
  3. Step 3: Cross multiply
    378,609.60x = 567,136.80 × 191,726.40
  4. Step 4: Simplify right side
    378,609.60x = 108,735,096,971.52
  5. Step 5: Solve for x
    x = 108,735,096,971.52/378,609.60
  6. Step 6: Final answer
    x = 287,195.83

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1.5x scale

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.