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Finding the Fourth Proportional to 391,376.40, 587,311.68 and 166,736.94

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Solution

The fourth proportional to 391,376.40, 587,311.68 and 166,736.94 is: 250,210.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,376.40 : 587,311.68 = 166,736.94 : x
  2. Step 2: Convert to fraction form
    391,376.40/587,311.68 = 166,736.94/x
  3. Step 3: Cross multiply
    391,376.40x = 587,311.68 × 166,736.94
  4. Step 4: Simplify right side
    391,376.40x = 97,926,552,349.46
  5. Step 5: Solve for x
    x = 97,926,552,349.46/391,376.40
  6. Step 6: Final answer
    x = 250,210.67

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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.