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Finding the Fourth Proportional to 666,090.82, 919,215 and 375,716.22

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Solution

The fourth proportional to 666,090.82, 919,215 and 375,716.22 is: 518,493.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,090.82 : 919,215 = 375,716.22 : x
  2. Step 2: Convert to fraction form
    666,090.82/919,215 = 375,716.22/x
  3. Step 3: Cross multiply
    666,090.82x = 919,215 × 375,716.22
  4. Step 4: Simplify right side
    666,090.82x = 345,363,985,167.30
  5. Step 5: Solve for x
    x = 345,363,985,167.30/666,090.82
  6. Step 6: Final answer
    x = 518,493.84

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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.