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Finding the Fourth Proportional to 285,567.87, 394,078.94 and 156,505.35

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Solution

The fourth proportional to 285,567.87, 394,078.94 and 156,505.35 is: 215,974.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,567.87 : 394,078.94 = 156,505.35 : x
  2. Step 2: Convert to fraction form
    285,567.87/394,078.94 = 156,505.35/x
  3. Step 3: Cross multiply
    285,567.87x = 394,078.94 × 156,505.35
  4. Step 4: Simplify right side
    285,567.87x = 61,675,461,649.80
  5. Step 5: Solve for x
    x = 61,675,461,649.80/285,567.87
  6. Step 6: Final answer
    x = 215,974.79

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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.