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Finding the Fourth Proportional to 665,919.82, 918,744.48 and 379,236.92

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Solution

The fourth proportional to 665,919.82, 918,744.48 and 379,236.92 is: 523,218.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,919.82 : 918,744.48 = 379,236.92 : x
  2. Step 2: Convert to fraction form
    665,919.82/918,744.48 = 379,236.92/x
  3. Step 3: Cross multiply
    665,919.82x = 918,744.48 × 379,236.92
  4. Step 4: Simplify right side
    665,919.82x = 348,421,830,107.16
  5. Step 5: Solve for x
    x = 348,421,830,107.16/665,919.82
  6. Step 6: Final answer
    x = 523,218.89

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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.