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Finding the Fourth Proportional to 445,495.23, 666,646.54 and 385,729.89

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Solution

The fourth proportional to 445,495.23, 666,646.54 and 385,729.89 is: 577,212.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,495.23 : 666,646.54 = 385,729.89 : x
  2. Step 2: Convert to fraction form
    445,495.23/666,646.54 = 385,729.89/x
  3. Step 3: Cross multiply
    445,495.23x = 666,646.54 × 385,729.89
  4. Step 4: Simplify right side
    445,495.23x = 257,145,496,543.08
  5. Step 5: Solve for x
    x = 257,145,496,543.08/445,495.23
  6. Step 6: Final answer
    x = 577,212.68

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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.