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Finding the Fourth Proportional to 285,419.75, 393,879.43 and 156,362.91

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Solution

The fourth proportional to 285,419.75, 393,879.43 and 156,362.91 is: 215,780.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,419.75 : 393,879.43 = 156,362.91 : x
  2. Step 2: Convert to fraction form
    285,419.75/393,879.43 = 156,362.91/x
  3. Step 3: Cross multiply
    285,419.75x = 393,879.43 × 156,362.91
  4. Step 4: Simplify right side
    285,419.75x = 61,588,135,026.16
  5. Step 5: Solve for x
    x = 61,588,135,026.16/285,419.75
  6. Step 6: Final answer
    x = 215,780.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.