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Finding the Fourth Proportional to 418,396.15, 577,664.74 and 321,427.29

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Solution

The fourth proportional to 418,396.15, 577,664.74 and 321,427.29 is: 443,783.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,396.15 : 577,664.74 = 321,427.29 : x
  2. Step 2: Convert to fraction form
    418,396.15/577,664.74 = 321,427.29/x
  3. Step 3: Cross multiply
    418,396.15x = 577,664.74 × 321,427.29
  4. Step 4: Simplify right side
    418,396.15x = 185,677,211,906.76
  5. Step 5: Solve for x
    x = 185,677,211,906.76/418,396.15
  6. Step 6: Final answer
    x = 443,783.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.