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Finding the Fourth Proportional to 385,711.61, 578,605.46 and 132,958.82

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Solution

The fourth proportional to 385,711.61, 578,605.46 and 132,958.82 is: 199,451.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,711.61 : 578,605.46 = 132,958.82 : x
  2. Step 2: Convert to fraction form
    385,711.61/578,605.46 = 132,958.82/x
  3. Step 3: Cross multiply
    385,711.61x = 578,605.46 × 132,958.82
  4. Step 4: Simplify right side
    385,711.61x = 76,930,699,988.88
  5. Step 5: Solve for x
    x = 76,930,699,988.88/385,711.61
  6. Step 6: Final answer
    x = 199,451.35

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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.