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Finding the Fourth Proportional to 445,208.63, 666,216.60 and 385,442.66

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Solution

The fourth proportional to 445,208.63, 666,216.60 and 385,442.66 is: 576,781.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,208.63 : 666,216.60 = 385,442.66 : x
  2. Step 2: Convert to fraction form
    445,208.63/666,216.60 = 385,442.66/x
  3. Step 3: Cross multiply
    445,208.63x = 666,216.60 × 385,442.66
  4. Step 4: Simplify right side
    445,208.63x = 256,788,298,440.16
  5. Step 5: Solve for x
    x = 256,788,298,440.16/445,208.63
  6. Step 6: Final answer
    x = 576,781.94

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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.