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Finding the Fourth Proportional to 445,494.23, 666,645.05 and 385,728.89

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Solution

The fourth proportional to 445,494.23, 666,645.05 and 385,728.89 is: 577,211.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,494.23 : 666,645.05 = 385,728.89 : x
  2. Step 2: Convert to fraction form
    445,494.23/666,645.05 = 385,728.89/x
  3. Step 3: Cross multiply
    445,494.23x = 666,645.05 × 385,728.89
  4. Step 4: Simplify right side
    445,494.23x = 257,144,253,231.85
  5. Step 5: Solve for x
    x = 257,144,253,231.85/445,494.23
  6. Step 6: Final answer
    x = 577,211.19

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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.