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Finding the Fourth Proportional to 445,141.89, 668,379.87 and 385,354.76

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Solution

The fourth proportional to 445,141.89, 668,379.87 and 385,354.76 is: 578,609.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,141.89 : 668,379.87 = 385,354.76 : x
  2. Step 2: Convert to fraction form
    445,141.89/668,379.87 = 385,354.76/x
  3. Step 3: Cross multiply
    445,141.89x = 668,379.87 × 385,354.76
  4. Step 4: Simplify right side
    445,141.89x = 257,563,361,050.78
  5. Step 5: Solve for x
    x = 257,563,361,050.78/445,141.89
  6. Step 6: Final answer
    x = 578,609.58

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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.