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Finding the Fourth Proportional to 283,455.61, 391,169.29 and 154,393.69

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Solution

The fourth proportional to 283,455.61, 391,169.29 and 154,393.69 is: 213,063.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,455.61 : 391,169.29 = 154,393.69 : x
  2. Step 2: Convert to fraction form
    283,455.61/391,169.29 = 154,393.69/x
  3. Step 3: Cross multiply
    283,455.61x = 391,169.29 × 154,393.69
  4. Step 4: Simplify right side
    283,455.61x = 60,394,069,756.80
  5. Step 5: Solve for x
    x = 60,394,069,756.80/283,455.61
  6. Step 6: Final answer
    x = 213,063.59

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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.