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Finding the Fourth Proportional to 285,998.88, 394,670.93 and 156,936.95

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Solution

The fourth proportional to 285,998.88, 394,670.93 and 156,936.95 is: 216,568.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,998.88 : 394,670.93 = 156,936.95 : x
  2. Step 2: Convert to fraction form
    285,998.88/394,670.93 = 156,936.95/x
  3. Step 3: Cross multiply
    285,998.88x = 394,670.93 × 156,936.95
  4. Step 4: Simplify right side
    285,998.88x = 61,938,452,209.86
  5. Step 5: Solve for x
    x = 61,938,452,209.86/285,998.88
  6. Step 6: Final answer
    x = 216,568.87

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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.